System prompt is forgotten between browsers

[Gabe]

When I save a non-default system prompt in my account, and then subsequently log in a different browser, the saved system prompt is not used.

1. Log in on a browser
2. Save non-default system prompt
3. Log in on another browser
4. Saved system prompt is not displayed / default system prompt is displayed

I would expect the saved prompt to be displayed.

I can replicate this issue between browsers and within browsers (private browsing in Brave).