I'm guessing you moved your sats onchain to Strike? And I'm also guessing these were coinjoined UTXOs.

My guess is this same thing would happen on any exchange. It sucks but that is the way it is. I've never done what you describe. Heard this before but not with Strike. Good to know. Thanks for sharing your experience.  

 Yes. On-chain and coinjoined. But I am doing the same with Binance in the same jurisdiction with more volume and never had a problem.