Unable to get back through map portals when in group

If I leave a map while in a group run (for example if I portaled out to sell something), I am unable to go back through the portals until another member leaves the map as well. The pics show portals I'm unable to join vs portals after a member has left the map.

Same here - it happens quite often. I play in party with my friend.

- In the guild hideout the portals disappear until we are both out of the map.

- In the player hideout the portals are visible but not clickable until we are both in the hideout.