Suggested by @thedzko, 'Maybe this has happened to many of you | Telegram Designers

Suggested by @thedzko, 'Maybe this has happened to many of you: you are replying a message and remember some information that you would like to add to your text, and suddenly you realize that you have to delete all your text (or select > cut > paste) in order to be allowed to search messages again.

With this behavior (which Telegram X already does) you'll be able to make more actions while you are typing by tapping the 3 dot button, and not just opening the attach panel.'