Code checking (lint+pep8+flakes...) stops working for the currently opened file after executing "go to definition" (Ctrl-c g) on something that leads to a different file, and then closing the split that was opened.

This one has been bothering me for a long time, I don't know if this is the only thing that triggers it because until now it always seemed to stop checking on random, I have finally found out how to reproduce it every time.

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