I hope this can be fixed eventually. The problem  is that issues only
ocurring intermittently are very tricky to reproduce and may be down to
conflicts or problems outside of the application. The best chance is to
find someone who's had a similar problem and see if together you can
find out any common features as to when the problem manifested.
Hopefully anyone reading your reiteration of the problem who has seen
something similar - even intermittently