I find it difficult to figure out a descriptive topic title for this. My english must be getting rusty. Anyway, do the following:
- Quote a post with the intention of posting a reply to a different topic
- Tap search from the top bar to find the desired target topic
→ The composer is enlarged to cover the whole screeen, while your typing still goes to the search field.
Reproed here, using Android and latest Chrome. 100% repro.