Peter, JetBrains started reporting anything that seems to slow down other threads back in 2025.2 (or maybe 2025.1). I've been working through any that I see or that are reported to me by users. When this happens, please click
Report problem and grab the full thread dumps from the resulting dialog, then send those over to me, ideally as an attachment to an issue in the public issue tracker. That will help me identify where they're happening and, ideally, allow me to address them in turn.
Regards,
Scott Wells