Are you using a VPN? If yes, try switching connecting to a new network or disabling it if you're able to do that. I personally use Cloudflare DNS to mask my IP due to country regulations. Did you try using both mirror links? (Betpanda.io or Betpandacasino.io). I was never asked to complete a ReCaptcha when logging in, nor have I ever faced any login issues whatsoever. I'm not being logged out every often as @jstyler mentioned either. I'll have to test it out again, but I don't recall it happening that often.

However, keeping login session would be a nice feature to add, even though it's not an issue to manually login everytime, it's a little more straightforward and user friendly.