ChatGPT Mode Switching Automatically: From o1 Pro to Unknown Versions – Any Solutions?

Hi,
I’m experiencing an issue with ChatGPT o1 Pro mode. While using this mode, the system automatically transitions to a standard version (possibly GPT-4). There’s also a notification: “Navigating version transitions.” Is this a known issue, or is there a way to lock the mode to o1 Pro permanently? Any insights or solutions would be greatly appreciated. Thanks!

and I’ve uploaded screenshots and a screen recording illustrating the issue here:
drive[.]google[.]com/drive/folders/1IrBvMekoSaHy2gtnbhrYGr5noACNzsj1
Let me know if additional details are needed!