It only happened 2 times for me—somewhere beginning of the last week and yesterday, so I can’t draw conclusions.
When it got into the loop yesterday, the chat stopped after a few loops, like on my screenshot, and failed with a VPN error, IIRC. I didn’t notice the loop, just the VPN error, and I tried to resume the chat, and it kept failing with the same error. Then I saw what was happening.
I think the first time, it wasn’t using any MCP and was looping until I noticed and stopped it. I thought it was s one time hiccup the first time.