(one using the VPN I usually use and one not to see if this was the reason) and sure enough, both got suspended upon posting it.
To be clear, what I am saying is that if you save and then post that image, your account is going to be locked for 12 hours. So probably dont do it, or do it in a test account.
P.S. This btw is precisely why A.I.s will kill us all (since I assume its a fancy ML "bug") :p
(Some replication by others would be nice. So as to see if it is only happening to me)
One small addendum to this. I see some people posting a picture which doesn't work for them, but it is of much reduced quality.
Usually the account seems to be posting from an iphone and so assume that there is some mobile carrier data compression going on.
The file you need to have must be 2480 x 3508 in size and about 3.20 Mb.