Thanks for the detailed analysis Ken. I tried to reply last Friday, but forgot to send it and lost my writeup

I'm pretty sure it happens only on Windows. I can try on Win11 as well but I would expect the same. I don't have my Win7 hosts anymore

I really only have access to Strawberry Perl v5.30.x and the linux version I am running... I use perl2exe to distribute my code and I'm locked in on those versions

I did take a look at the active bugs and the 11679 Tk not 64-bit clean was pretty interesting... I do think if that were the issue, it would crash on Linux hosts as well... The code the in tkGlue.c that the bug highlighted has been around for a very long time!

thanks again for the feedback!