mirek wrote on Wed, 02 October 2019 16:40

I concur that this problems haunts me for years, but it is so rare (in my case) that I never got to catching the cause.

Now thinking about it, maybe the problem is that the file is locked for writing while being compiled?

Mirek

I don't know if this bit of information helps or not but when it this problem occurs it's also clearing the undo buffer so you can't go either forwards or backwards. Could it be related to when undo buffer is full and it's ejecting the oldest entries?