SetFinalSizeMaxDiscrepancy getting stuck in an infinite loop in .NET 4.7.1

I’ve received several dump files from my customers where the top of the call stack is in either in  SetFinalSizeMaxDiscrepancy, or a function that SetFinalSizeMaxDiscrepancy is calling.  It appears that it is stuck in the 

for (bool runPhase2and3=true; runPhase2and3; )

loop.  I can’t step through the code, so tracing down why it is stuck is very difficult.  Has anybody else run into this problem?

Thanks

Dan