Support not very helpful and the UX on the website is poor. Last night, transferred USDC and wanted to convert to USD. Both the simple Convert, Sell web pages show my total USDC balance but restricted me from adding Max USDC for transaction. Was limited to adding 18 USDC. This morning, the same exact simple Convert, Sell web pages allow me to add the Max USDC for transaction. Would be helpful to know if there is expected time restriction on transferred digital assets, or why the same exact interfaces on web page work completely different for the same transaction at different times. I hate to say it, but Coinbase works every time. It’s more expensive but it works every time.