Immediately after switching budget accounts in the mobile app, crypto accounts from the first budget account continue to display in the Accounts Overview for the second budget account.
This issue only manifests immediately after switching budget accounts, and only affects crypto accounts (other account types seem to behave correctly). If you close and reopen the app, the Accounts Overview will display as expected.
Also, the option to expand and collapse "Cryptocurrency" accounts under the Accounts Overview, doesn't apply to these crypto accounts that 'sneaked in' from the other budget account.