It is common for centralized exchanges to do things like these without any warning or reason, you are one very lucky person that your funds were not confiscated, so many people haven't been so lucky and their funds were confiscated by one centralized exchange without warning and reason, and when the users ask for a reason, the support team are never helpful.

By the way, why do you have your funds on Coinbase, haven't you been following the recent events with centralized exchanges and services: Three Arrows Capital, Celsius, Voyager, ftx... Move your funds to your self custody wallet and own your keys.