Strange behavior when pasting text onto emoji

Android version: 10
Device: Huawei Mate 20
Delta Chat version: 1.46.0
Expected behavior: When I paste text containing emoji onto an emoji, the characters should not disappear.
Actual behavior: If you paste text with emoji onto an emoji the text disappears, if you leave the chat and re-enter the text it reappears.
Steps to reproduce the problem: Copy some text with emojis inside, then insert an emoji into the chat without sending it, select the emoji and paste the previously copied text.
Screenshots:

deltachat / deltachat-android