RealtimeWYSIWYGEditorIT.editSameParagraph is flickering

expected: <The quick brown fox jumps over the lazy dog. First. Separator. The quick brown fox jumps over the lazy dog.> but was: < quickThe quick brown fox jumps over the lazy dog. First. Separator. The brown fox jumps over the lazy dog.>

org.opentest4j.AssertionFailedError: expected: <The quick brown fox jumps over the lazy dog. First. Separator. The quick brown fox jumps over the lazy dog.> but was: < quickThe quick brown fox jumps over the lazy dog. First. Separator. The brown fox jumps over the lazy dog.>
	at org.xwiki.realtime.wysiwyg.test.ui.RealtimeWYSIWYGEditorIT.editSameParagraph(RealtimeWYSIWYGEditorIT.java:499)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)