Have you heard back from Meraki support yet?
Yes after long waiting on the call.
Has anyone else had this same issue?
From Meraki Tech no other customers report this problem but it's a new Firmware Feb 28,2022. That mean probably no one did upgrade yet. Strange thing happen to MX64 tested yesterday and same problem with MX100 ; Groupe policy, whitelisted not work...
I was on WebEx with Meraki Support tech and even him, he didn't understand.
For now we are in full production, I had to rollback to 15.44. All working with no problem.