Is this a known and logged issue? Should I send the minidump file and/or the scene? I hope there are stability fixes for IPR in Vray 3.6. I’m sad to say this but unfortunately lately I’m finding it to be a bit unrealiable. 
I’m always on toes and saving every 2 minutes if I use it because I know that it will eventually crash.
Should I send the minidump file and/or the scene?
Yes, please. Send us the Max file and the crash dump if you have it to support@chaosgroup.com
Good, I sent both files to support. 
I found the ticket. Thanks!
I get the same problem when rotating a perspective view in the viewport (not the one rendering). Ipr will crash everytime as soon as I start rotating any viewport view.
Also turning off or on a light will crash IPR. it seems only tweaking materials don’t crash it.
I just upgraded from nitghtlies 2017-06-11 to today’s nightly (2017-06-22) and I can now move lights turn them on and off and rotate the viewport without crash now! 
Very good to know!
Best regards,
Vlado