Previously, I have never experienced losing the 2FA code but now I don't save Rollbit's secret 2FA code while the 2FA code is still active at the extension.
I really can not understand your post. How 2FA code can be active at an extension?
What I mean is that I installed Google Authenticator in the browser (extension) the 2FA code is still there, but the Secret code is not saved because I forgot it first.
If you don't backup your 2FA (activation) code properly, you will have risk of losing it and also troubles with your account in future.
And this is what it means --- not backing up the secret 2FA code, which is afraid of getting problems in the future.
Like I have to disable 2FA first and re-enable 2FA and then save the secret code, so that if I have backed up the code I will feel more relieved.