1. Open file, highlight text, click the backspace to remove, save file = File empty
2. Click Undo or Ctrl-Z. Text appears, but file is still in a saved state, so when you click Save or Ctrl-S, nothing is actually saved. Close and open file and it is blank.
This has been happening a lot since the last update, so maybe something broke? It was ok before.
tip: what is changed in last versions- mouse clicks are sttored to undo list. so give me repro of bug - just make some clicks in editor and make stable repro - steps.