Printer constantly pauses with no obvious reason

Hello people. Since yesterday evening my VCore4 pauses every couple of minutes. At some point it manages to run normal for half an hour and then again pausing. Both filament sensors are disabled. I'm printing with T0 only currently.
Nothing shows in the console and I saw no Pause mentioning in Klippy.log exept in the inital paragraph with the macros. Any hint to where to search for the culprit? Could it be overheating or loose connection?