Not sure if this needs to be posted here or in the General Issues subforum.
Anyways …
Every fresh session, depending on the last server used, e.g. TQ, logging in to Sisi requires a verification mail. If the last server was Sisi, then TQ requires a verification mail. And that several times per day…
Don’t turn off 2FA, it’s there for your protection. Moreover, that behavior is not caused by 2FA, because I have it enabled, and don’t have to deal with that every time I change servers.
So what is causing it? Dunno. Can only suggest generic troubleshooting steps, starting with fixing file permissions. Past that, you can try making a support ticket. I don’t think they’ll help you with test server stuff, so maybe leave that part out, and just mention that you frequently to input verification codes when you get on TQ.