[prawks]

Any more than 5 instances of VS running on one machine gives me pause. I can't imagine going into double-digits, let alone 50+.

I can see 70 files or projects open, but not in VS.

EDIT: Ah, seems I skipped the part where the additional instances are closed.

[DougBTX]

Step 2 in the reproduction case also includes shutting down the new instance, so I think there is only ever a maximum of two instances at a one time. Seems that the unusual bit is that 70 instances are opened without ever closing the very first instance.

[ygra]

My cat once managed to launch 167 instances ;-)

[masklinn]

It's not multiple instances running at the same time, step 2 kills an instance. It's one "main" instance running continuously, then opening and closing a second instance over and over.