There’s no mention of the bug being Android or device specific on the Github report.
You can see an example of the bug in the screen shot below. There was only a single line entry box which didn’t respond / expand when enter was pressed for a new line, or show the additional lines for signatures added via the manage identities page..
Thanks for your reply. That’s strange. As I mentioned, I didn’t have any problems in version 22. Well, at least it’s working again now for everyone who had this issue.