Annoying pauses in 95.105

I have been seeing some annoying pauses in the 9.0.3 EAP (95.105
Ultimate). The UI stops responding to mouse/keyboard events for 5-10
seconds but catches up on events when it comes back.

This may be related to having two projects loaded.

Is this a known problem?

I know that without a thread dump it would be hard to diagnose the
problem - could someone please remind me of the link on how to do that?

Thank you,