3ds Max "stealing" one of my CPU cores when doing nothing

[Alex_M]

I noticed a strange behavior with 3ds Max 2021. Sometimes when I don't do absolutely anything in Max, it is constantly using 100% of one of my cores. Only way to stop this is to restart Max, but after a while it happens again. Has anyone else seen this? Screenshot below.

[Joelaff]

Yep, I posted about this before. Never got a response. Restarting Max fixes it, but WTH causes it?

Sometimes Max can sit open for days without this issue. Other times it will do it after twenty minutes.

[vlado]

In one instance that I debugged, this was caused by some Substance DLL and I reported it to Autodesk, There might be other situations though.

Best regards,
Vlado

[Alex_M]

Interesting. Thanks for the input!