Sub-account switching causes login UI to disappear (background-only screen)

When switching between sub-accounts, the game always returns to the login screen where only the background is visible. The login UI elements (email field, password field, buttons) do not render at all. The game is not frozen; only the UI layer is missing.

The only visible and clickable element on this screen is the Patch Notes panel in the bottom-left corner. No other login-related UI elements appear or respond.

Both sub-accounts bensen0#3389 and UtileMaple3#8041 display the message:
“Your account will be allowed to log in and play during Path of Exile 2 Early Access.”
In addition, characters were created and played on both accounts during previous seasons, confirming that both accounts have successfully accessed and played the game before.

Edit: On the background-only screen, pressing Enter resolves the issue and allows me to log in.