There is any issue with track change behavior. Below are the steps to reproduce:
1. Highlight any text that will cross over to the next line/s and make a change (delete, insert text).
2. Yelow changes indicator will appear on the modified line.
3. Hit Undo. The changes will revert to previous and the tracked changes indicator will disappear on the previous modified line. However, the highlighted text of the next line/s will now show yellow changes indicator.
It's expected that there should be no yellow track change indicator after undo. This is different from Visual Studio.