Bot send no Masage via Hotspot or Teltonika Router

Hello, I've been using the bot for a very long time without any problems. Recently, however, it only works in home WiFi and with my Fritzbox 6820 GSM on the go. When I connect it via an Android hotspot or ipad hotspot or Teltonika router, I no longer get a message from the bot. Has anyone an idea why this could be?