I gave it a quick try for about 10 minutes, not saying its fixed, but I did notice my steam advanced launch options:
(I'm not sure if you already have them)
"-maxmem=8192" "-maxvram=4042" "-cpucount=4" "-exthreads=7" -nosplash -skipintro
Judging on the the type of problem and it seeming to be only me, this is probably the reason. These options do however greatly increase my fps, so I would prefer to keep them in place...