Space tabs: Disabled pointer events for html anker tags (<a>) and set the pointer cursor manually. Due to the attribute href and its value "#", WebArena would redirect to another url.

Example:
--------
Current room:
../room/public

click on private space tab:
../room/PrivateSpacexyz is loaded (you can see it for a few milliseconds)

Until WebArena loads:
../room/public#