Userbencmark have very low impact on stability. Something else is problem.
I run and almost all results are Outstanding or Excellent on CPU, Very Good on oldest Force GT...
What that mean, some percents... How my Dominator Platinum 2666 C15 could be Outstanding... or GTX1080Ti 140% Oustanding...
That's not accurate test and I suppose every system could fail if something is wrong with some software, maybe Browser even...
Temperatures didn't pass 5C above idle on any component.
I would bother if Futurermarks and Unigine benchmarks crash, Intel Processor Diagnostic Tool, Real Bench, AIDA64, Mem86, etc... Passmark, PC Mark,... they need to pass all the time.