* A [bug in AndroidX](https://issuetracker.google.com/issues/64729576) makes it hard to grap the fast scroller.
* Encryption with YubiKey results into an infinite loop. Since looking into several log files didn't reveal the problem: sponsor me a [Yubikey 5 NFC](https://www.yubico.com/product/yubikey-5-nfc) so I can reproduce the problem.
* Scrolling to an internal linked location in original messages does not work. This can't be fixed because the original message view is contained in a scrolling view.
* A preview of the message text doesn't (always) appear on a Pebble, a Samsung watch and possibly other wearables for unknown reasons, but does appear on a Mi band 3 used with [GadgetBridge](https://gadgetbridge.org/).