Thank you for your answer.
What exactly are the problems with the current kernel there? Could you maybe point me to the relevant discussion?

If you have lag, it is likely related primarily to your screen - There are other posts on the forum, and make sure your screen is in Game mode if it has one.

I cherry-picked the fix into our lr-ppsspp fork so if you re-install that from binary/source it should also run without the pauses (tested working here)