High CPU Temp on low load

Hi there,

since a few days my F13 Intel 12th Gen (i7 1280P) started to heat up to almost constant 90-100°C on very low load.
OS: Win11 23H2 Build 22631.4751
Already did driver updates, cleaned dust and checked thermal paste, looks fine so far.

Here is a screenshot from core temp.

Any Ideas what could cause this?

Edit:
Also Software like Chrome or even Explorer do randomly not respond for a few seconds, this also came with the high temps.