TDM merger fails due to infinite recursive loop

2016-04-28 12:13:09,528 WARN [com.atlassian.confluence.plugins.merge.TDMMerger:thread-311] [confluence.plugins.merge.TDMMerger] mergeContentInternal Merge failed.
 -- url: /confluence/pages/editpage.action | referer: https://XXXX/confluence/display/SPACE/PAGE | userName: user | page: 1052053228 | action: editpage
java.lang.RuntimeException: ASSERTION FAILED: Merge.treeMerge(). Infinitive recursive loop.
        at tdm.lib.Merge.treeMerge(Merge.java:107)
        at tdm.lib.Merge.treeMerge(Merge.java:173)
        at tdm.lib.Merge.treeMerge(Merge.java:173)
        at tdm.lib.Merge.treeMerge(Merge.java:173)
        at tdm.lib.Merge.treeMerge(Merge.java:173)
        at tdm.lib.Merge.merge(Merge.java:82)
        at com.atlassian.confluence.plugins.merge.TDMMerger.mergeContentInternal(TDMMerger.java:99)
        at com.atlassian.confluence.plugins.merge.TDMMerger.access$000(TDMMerger.java:46)
        at com.atlassian.confluence.plugins.merge.TDMMerger$1.call(TDMMerger.java:120)
        at com.atlassian.confluence.plugins.merge.TDMMerger$1.call(TDMMerger.java:116)
        at com.atlassian.sal.core.executor.ThreadLocalDelegateCallable.call(ThreadLocalDelegateCallable.java:42)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)