Quiz polls (type=quiz) render as "This message is not supported" on all clients — started March 20, 2026
Quiz polls sent via Bot API are completely broken on all Telegram clients. Regular polls work fine — only type=quiz is affected.
Steps to reproduce
Steps to reproduce:
Send a quiz poll via Bot API with type=quiz and correct_option_id
Open the chat on any client
Expected: Quiz poll renders normally
Actual: "This message is not supported by your version of Telegram. Please update to the latest version."
Notes:
Bot API returns HTTP 200 OK — server accepts the poll, failure is client-side rendering only
Regular polls (type=regular) render correctly on all clients
Manually creating a quiz poll through the Telegram UI itself produces the same error — this is NOT a Bot API issue
Tested on: Telegram Desktop (latest), Android (latest), iOS (latest)
Tested with VPN — not a regional issue
Started suddenly on March 20, 2026 with no client updates