Tesla 4 crashes ML350 gen9

Hi all,
nice to be onboard and hope someone can give me some help.
I am running a HP ML350 with ESXi 6.7 U3.
I just installed a TESLA 4 - just to figure out, that ESXi keeps crashing just after some minutes.
Did not dig inside the dump yet - but maybe no need to if anyone might faced the same issue.
btw. the system is running super stable without the card - and the card was actually also tested and running well in a DL380 Gen10 Server. Would appreciate any help…

Also the card itself is recognized within ESXI (so it’s listed in HardwareSection) - but i could not do further tests as the systems fails after just being up some minutes. Help or advice really appreciated.