ChatGPT Reasoning Effort Issue

Is anyone else getting an issue where in setting, the available reasoning efforts selected are 6 (which includes ultra) but are not getting it as a selectable option?

I also often get an issue where max and ultra will randomly appear and disappear from being available, without my changing the available reasoning effort settings.

This is happening on the latest version of my chrome browser, as well as the ChatGPT Classic Desktop app and the latest version of the newer ChatGPT Desktop app.

I have ChatGPT plus.