diff --git a/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitLogCommand.java b/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitLogCommand.java
index 2ea25126cf..a6f74d24eb 100644
--- a/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitLogCommand.java
+++ b/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitLogCommand.java
@@ -205,7 +205,7 @@ public class GitLogCommand extends AbstractGitCommand implements LogCommand
         ObjectId ancestorId = null;
 
         if (!Strings.isNullOrEmpty(request.getAncestorChangeset())) {
-          ancestorId = computeCommonAncestor(request, repository, startId, branch);
+          ancestorId = repository.resolve(request.getAncestorChangeset());
         }
 
         revWalk = new RevWalk(repository);
@@ -225,16 +225,15 @@ public class GitLogCommand extends AbstractGitCommand implements LogCommand
             revWalk.markStart(revWalk.lookupCommit(branch.getObjectId()));
           }
 
+          if (ancestorId != null) {
+            revWalk.markUninteresting(revWalk.lookupCommit(ancestorId));
+          }
 
           Iterator<RevCommit> iterator = revWalk.iterator();
 
           while (iterator.hasNext()) {
             RevCommit commit = iterator.next();
 
-            if (commit.getId().equals(ancestorId)) {
-              break;
-            }
-
             if ((counter >= start)
               && ((limit < 0) || (counter < start + limit))) {
               changesetList.add(converter.createChangeset(commit));
diff --git a/scm-plugins/scm-git-plugin/src/main/js/RepositoryConfig.js b/scm-plugins/scm-git-plugin/src/main/js/RepositoryConfig.js
index ecb3281ec2..e34a0ef96f 100644
--- a/scm-plugins/scm-git-plugin/src/main/js/RepositoryConfig.js
+++ b/scm-plugins/scm-git-plugin/src/main/js/RepositoryConfig.js
@@ -66,7 +66,7 @@ class RepositoryConfig extends React.Component<Props, State> {
 
   branchSelected = (branch: Branch) => {
     if (!branch) {
-      this.setState({ ...this.state, selectedBranchName: null , defaultBranchChanged: false});
+      this.setState({ ...this.state, selectedBranchName: undefined, defaultBranchChanged: false});
       return;
     }
     this.setState({ ...this.state, selectedBranchName: branch.name, defaultBranchChanged: false });
diff --git a/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitLogCommandAncestorTest.java b/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitLogCommandAncestorTest.java
new file mode 100644
index 0000000000..d36922f941
--- /dev/null
+++ b/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitLogCommandAncestorTest.java
@@ -0,0 +1,102 @@
+
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.repository.spi;
+
+import org.junit.Test;
+import sonia.scm.repository.ChangesetPagingResult;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+/**
+ * Unit tests for {@link GitLogCommand} with an ancestor commit. This test uses the following git repository:
+ *
+ * <pre>
+ * * 86e9ca0 (HEAD -> b) b5
+ * *   d69edb3 Merge branch 'master' into b
+ * |\
+ * | * 946a8db (master) f
+ * | * b19b9cc e
+ * * | 3d6109c b4
+ * * | 6330653 b3
+ * * |   a49a28e Merge branch 'master' into b
+ * |\ \
+ * | |/
+ * | * 0235584 d
+ * | * 20251c5 c
+ * * | 5023b85 b2
+ * * | 201ecc1 b1
+ * |/
+ * * 36b19e4 b
+ * * c2190a9 a
+ * </pre>
+ * @author Sebastian Sdorra
+ */
+public class GitLogCommandAncestorTest extends AbstractGitCommandTestBase
+{
+  @Override
+  protected String getZippedRepositoryResource()
+  {
+    return "sonia/scm/repository/spi/scm-git-ancestor-test.zip";
+  }
+
+  @Test
+  public void testGetAncestor()
+  {
+    LogCommandRequest request = new LogCommandRequest();
+
+    request.setBranch("b");
+    request.setAncestorChangeset("master");
+
+    ChangesetPagingResult result = createCommand().getChangesets(request);
+
+    assertNotNull(result);
+    assertEquals(7, result.getTotal());
+    assertEquals(7, result.getChangesets().size());
+
+    assertEquals("86e9ca012202b36865373a63c12ef4f4353506cd", result.getChangesets().get(0).getId());
+    assertEquals("d69edb314d07ab20ad626e3101597702d3510b5d", result.getChangesets().get(1).getId());
+    assertEquals("3d6109c4c830e91eaf12ac6a331a5fccd670fe3c", result.getChangesets().get(2).getId());
+    assertEquals("63306538d06924d6b254f86541c638021c001141", result.getChangesets().get(3).getId());
+    assertEquals("a49a28e0beb0ab55f985598d05b8628c2231c9b6", result.getChangesets().get(4).getId());
+    assertEquals("5023b850c2077db857593a3c0269329c254a370d", result.getChangesets().get(5).getId());
+    assertEquals("201ecc1131e6b99fb0a0fe9dcbc8c044383e1a07", result.getChangesets().get(6).getId());
+  }
+
+  private GitLogCommand createCommand()
+  {
+    return new GitLogCommand(createContext(), repository);
+  }
+}
diff --git a/scm-plugins/scm-git-plugin/src/test/resources/sonia/scm/repository/spi/scm-git-ancestor-test.zip b/scm-plugins/scm-git-plugin/src/test/resources/sonia/scm/repository/spi/scm-git-ancestor-test.zip
new file mode 100644
index 0000000000..d740de7674
Binary files /dev/null and b/scm-plugins/scm-git-plugin/src/test/resources/sonia/scm/repository/spi/scm-git-ancestor-test.zip differ
diff --git a/scm-ui-components/packages/ui-components/src/repos/LoadingDiff.js b/scm-ui-components/packages/ui-components/src/repos/LoadingDiff.js
index 5f6330f0e5..2ebc4a170b 100644
--- a/scm-ui-components/packages/ui-components/src/repos/LoadingDiff.js
+++ b/scm-ui-components/packages/ui-components/src/repos/LoadingDiff.js
@@ -30,6 +30,16 @@ class LoadingDiff extends React.Component<Props, State> {
   }
 
   componentDidMount() {
+   this.fetchDiff();
+  }
+
+  componentDidUpdate(prevProps: Props) {
+    if(prevProps.url !== this.props.url){
+      this.fetchDiff();
+    }
+  }
+
+  fetchDiff = () => {
     const { url } = this.props;
     apiClient
       .get(url)
@@ -46,15 +56,18 @@ class LoadingDiff extends React.Component<Props, State> {
           error
         });
       });
-  }
+  };
 
   render() {
     const { diff, loading, error } = this.state;
     if (error) {
       return <ErrorNotification error={error} />;
-    } else if (loading || !diff) {
+    } else if (loading) {
       return <Loading />;
-    } else {
+    } else if(!diff){
+        return null;
+    }
+    else {
       return <Diff diff={diff} />;
     }
   }