Hi,
I've been having this problem with the last couple releases. When I work with one or two 32-bit FITS images and mouse over History Explorer, PI freezes/deadlocks with process CPU usage at ~34%. The RAM allocation keeps increasing. It doesn't recover and needs to be shut down. If the history is short (just a couple processes), the problem isn't reproducible but after some processes (4-6?) I don't even dare use History Explorer.
Using Win10, Latest PI version 01.08.04.1195. Quad-core I5-6600K, 24GB RAM.
Let me know if/how I can provide logs or some such.