Description:
After the recent Telegram mobile app update, a new header bar appeared at the top of bot chats. This header displays a preview of the last message sent by the bot (first line of text).
This header was not present in previous versions and appeared automatically after the update without any changes on the bot side.
The header cannot be removed via Bot API:
deleteMyCommands — executed successfully, header remains
setChatMenuButton with {"type":"default"} — executed successfully, header remains
Bot details:
Bot username: @Timer24bot
Platform: Android / iOS mobile app
Desktop version: works correctly, no header shown
Expected behavior: No header bar in bot chat, as it was before the update.
Actual behavior: A persistent header bar appears at the top of the chat showing the first line of the last bot message (№ start timer en...). This affects all bots, not just one.
This issue affects 15+ bots. Please provide a way to disable this header via Bot API or revert to previous behavior.
Steps to reproduce
1 Start bot @Timer24bot
2 Press 🗑
3 See the pic above