The nether portal in my realm doesn’t work

Me and my friends have a realm,  and when we go into the nether it won’t let us back into the overworld. This has been an issue for about a week, the only way out is dying.Leaving  and rejoining doesn’t do anything. This is really making playing on the realm impossible. As you can see in the photos, the portal is lit, but it won’t let me through. I don’t know if this is a realms only.