We're experiencing a very basic problem in which our Copilot Studio agents somehow do not read images (tested with .png for sure) when prompted through Copilot Chat or Teams.
The agent itself is a very simple chatbot, the file upload setting is enabled. The idea is users should be able to upload photos which the agent needs to read some handwritten text from. Pretty basic stuff these days, but when uploading the file it simply doesn't recognize it at all. The agent either returns some hallucinated nonsense such as "I see you've uploaded a picture (it did not in fact see this), let me analyze it (it did not do this)" or returns a fallback error "I'm sorry I wasn't able to respond to that".
The weird thing is this feature works totally fine with agents built through the "simple" agent builder in M365. No problem at all. It's purely Copilot Studio (we have both M365 licences and pay-as-you-go credits) agents that somehow cannot do this. It also works in the actual Copilot Studio test chat, just not in Teams/Copilot Chat!
Nobody thus far has been able to help us with this rather basic but key issue. Anyone else experience this and hopefully has found a solution?