sounds like an AI did it, i think it happened to everyone beginning of FEB. plus there were also site wide banning people. at first they dint care about you having multiple accounts participating in the same sub, since they had off-the books rule of unbanning automatically after a certain amount of time. now with all those purges, the AI look for previous violations even the ones you were unbanned, they “shadowbanned”. plus now they look any account that remotely “resembles botting/spamming and banning people” NEW AND old inactive accounts are very susceptible to be being ban without reason. they also keep track of deleted accounts on your device too.
now they upted thier filtering, by unilaterally deleting any comment and post, without MOD noticing it, many reporting its to get it astroturfed by right wingers, im seeing that alot on reddit(i have a shadowbanned account too)