No shit!
I had exactly the same thing happen, no reason given at all.
My ban came after I answered two very long winded questions via DM. My responses were long and in depth and I assumed that was the reason, but I never received any response to my appeal. Now an X exile on here like you.
Odd timing as my lock out happened around the same time & I seem to be treading a similar path of the threads I’m following.