Ok, I have now played for 1 month (15.11.2023 - 15.12.2023) without crashing. ~ 400 battles.
It would seem like "Hitmarker" maybe was the culprit.
Im adding back some mods now:
Show the garage clock
Show advanced info on the carousel
Accurate Damage Indicator
Disable Gun shake effect after shot
Scope Shadow Remover
Custom Damage Indicators
Object 279 Personal Mission auto-reset
Marks of Excellence calculator lebwa
Sixth sense animated icon 10s bulb
Fog Remover: fog & sun-glare
Garage icons, class colored icons + golden colored premium tanks by aslain
Garage Mastery
Unanonymizer on battle results
Crew Auto-return Oldskool
Equipment & skill icons: Marked ammo icons
Will update after some playtime or if game crashes again 😉
Nor.DuFFman's post in Game crashing at the end of battle when loading back to the garage was marked as the answer