have same problem, hardware issue maybe
first system not underpower E5 2678v3 ( i know, server CPU, i know what my system capable, so please no more "it server cpu it bad for game"), 32gb ram, 3060ti
sec system not overheat, CPU around 50C, GPU around 50C with hotspot 60C
third power supply not failure 750w platium, system run totally fine with max setting RDR2, Cyber2077 etc... for 3-6 hour without any tiny problem while having more heat than play warframe
but warframe recent just cause my system restart everytime im load in game with team, it fine if im doing everything solo
swap 3060ti back to 1060, everything work fine, team or solo