Well the problem is that both try to access the contents of the input field at the same time and that doesn't work or it requires major modifications (on both add-ons) to make it work.
I didn't install the auto tagger to test it but yes, this might be a problem. Can you disable this behaviour in the auto tagger settings? If so this might a solution.

If I recall correctly, the auto tagger works even with this feature turned to 'off'.