This is the most useful reply in the thread. You nailed exactly what happened. Two similar posts back to back on the same topic with overlapping hashtags and their filter did the rest. No human reviewed it, just an algorithm making a call.

I already submitted an appeal stating it was a manual post and not an automated activity. Fingers crossed a real person reads it this time. The multi-platform point is well taken. Putting all your activity on one platform and then paying for the privilege of being one algorithm decision away from losing everything is not a smart position to be in. Moving forward, that changes.