Coding agent stuck in loop after adding screenshot to chat history

[GomanovNA]

Select Topic Area

Bug

Copilot Feature Area

Copilot Coding Agent

Body

Hey all!

Facing a strange "bug" during Copilot coding agent runs - infinity loop when adding screenshots to chat history

[log_58e9ba, x-request-id: "00000-d643e0c0-ac6a-4290-baea-6ec7aed39ef6"] post https://api.githubcopilot.com/chat/completions succeeded with status 200 in 2798ms
[log_65bfa5, x-request-id: "00000-c1c29f1c-e6fe-4540-9c30-16de959b3918"] post https://api.githubcopilot.com/chat/completions succeeded with status 200 in 2436ms
[log_ccec8d, x-request-id: "00000-034bce5e-4dd8-44e1-b001-1a23e0f9be05"] post https://api.githubcopilot.com/chat/completions succeeded with status 200 in 2442ms

My agent is a QA agent to navigate websites and build test cases.

So normally Copilot navigates web site, takes screenshot, analyzes and moves forward according to the instruction.
I can see it like this in normal cases

Now, after a few navigation moves (different number, maybe 5-10) agent just stuck I guess adding screenshots in almost infinity loop like this

This can go for 10-30 min unless I guess some internal engine pushes Copilot to get back to work and after that it starts moving back to instruction scenario like this

git diff --name-only HEAD 59dc48b0bc7df95b6e1027b4c963d3f6fa61262b
Thu, 27 Nov 2025 06:06:01 GMT
[log_9617f7, x-request-id: "00000-eee511b3-0085-4aa6-ad65-661de1993c33"] post https://api.githubcopilot.com/chat/completions succeeded with status 200 in 4353ms
Thu, 27 Nov 2025 06:06:02 GMT
copilot: Good reminder!

Anyone seen something like this? Any ideas to fix it?

Thanks!

[Pallandos]

Hello there,
Just an advice sou should not paste image into ai chats, they are really bad at analyzing images. You should just copy/paste texts, they are much more efficient at this task.

Good luck!

[GomanovNA]

It's not quite image in the chat) It's taking image screenshot by coding agent for me into a folder, so not quite this case. Plus first 5-10 screenshots are perfectly fine)

[GomanovNA]

Thank you!

The thing is that it's all automated) It's not me who is doing anything - it's automated github copilot coding agent session that I instructed to take screenshots while navigating website is making them and first 5-10 steps with screenshots are working perfectly fine. So I assume it's some kind of Playwright_MCP_take_screenshot_tool together with Coding agent itself leading to such strange loop which I can't affect as it's all automated headless process.