Board Thread:Support Requests - Getting Technical/@comment-27234079-20200503221750/@comment-9605025-20200504005205

From the list of known bugs: I don't know for sure but perhaps this is related to (if not exactly) your issue. From your image, it seems like you are using a UCP wiki
 * Source editor has issues where the text caret is displayed in the wrong position from the true caret. This used to be a common occurrence, but now it has gotten a lot better, and a lot more rare.  (2020/4/28)