This is all very new, I have been an active tester. I have lost some ecash with early bugs as clearly explained by the devs and as calle has been very open about

but also i was more than compensated for my testing. I have been able to recover ecash as well using the proofs. You can always send the ecash to another CASHU client or mint that has a better solution for you

This is an amazing solution for private custodial zapping. Self custody is best, custodial ecash has its trade offs.