Opening into a new tab signs out

Using Edge on Windows 10.

I've had to continuously log back into both the website and the trade website when opening multiple tabs. Any time I ctrl click a link to open it in a new tab or open a second trade page to look for a different item while keeping the other still searching I get signed out and have to re-enter all data and another Captcha.

Cookies are enabled and so is the 'remember me' setting when I sign in.

*edit - seems to have been fixed as I was writing this now after 20 minutes of frustration.