Sublime Text GUI does not always reflect PEP8 or Pyflakes output

[domino14]

Sometimes there are errors in the console (C-`) but these are not highlighted in the code. Vice versa, there will also be highlighted zones that have no errors. When this happens, the bottom bar of Sublime Text also stops showing errors (only Line/Column). Even restarting Sublime Text 2 doesn't seem to fix it a lot of the time.

[vorushin]

How could I reproduce this bug? Could you attach some code snippet?