This is an exploit to more easily win a pvp match and should be patched.
It’s a simple fix, put a gate on the portal that only the respective faction can open (no key or cast time required)
This means they can’t force you out of the instance unless an ally of yours opens the gate for them, and then in turn you can report your ally for;
- Intentionally trying to lose the match for your team.
It would be a minimal change.