Hello! When scrolling through messages, the subject, sender and recipient parts disappear. They appear temporarily when I tap on the icons or blank areas at the top, but disappear again when I scroll. This happens with both plain text and HTML emails, but only some HTML emails display fine. I can't find any other similar questions, so I wonder if this problem is unique to my environment? If so, I'll wait until I buy a new smartphone. Please give me some advice.

Thunderbird for Android 8.2 OPPO AX7 (Android OS 8.1), Japanese