Since a very recent VRChat update, disabling portals in the event breaks them.

The inability to disable portals during initial setup has been an issue for some time, but it has now worsened : Disabling portals even in a delayed event like can break them.

Even disabling portals one second after appears to be too early, as some portals fail to load properly, meaning that there's technically no reliable way to disable them. The only reliable workaround is to move the portals far away from the player to an out-of-bound location.

This is an issue I noticed in my Lightcycle Arena world, where my "Disable portal" code worked for quite some time.