The Telegram/Discord /model command's actual switch calls switch_model()
directly on the asyncio event loop. switch_model() can fall through to a
synchronous models.dev HTTP fetch (requests.get, 15s timeout) on a cold or
expired cache, freezing the gateway for up to 15s and dropping the Telegram
connection while a user switches models.
The picker provider-list and fallback text-list sites were already offloaded
(#41289), but the two _switch_model() calls — the picker callback and the
direct /model <name> path — were not. Wrap both in asyncio.to_thread.
Closes#20525.
Teknium
d4c2217e87