Datamodel disappears from pbix on save

Hi, please see my post on the forum on 10-28-2022:

https://community.powerbi.com/t5/Desktop/Datamodel-disappears-from-pbix-on-save/m-p/2873806#M989414

Your support rep. v-polly-msft answered that I could send you a pbix demonstrating the issue so you can try to debug it. I have made an anonymized pbix for this (5MB), but where should I send it (I haven't heard anything more from v-polly-msft about this)?

My fear is that this issue is caused by some corruption in the meta data in the pbix that may haunt me in the future.

Eric