Squad errors

[Genreless]

Since probably last Thursday, I have found that I am unable to join other players' groups.  When I try to join a group it sits for a while and then starts the standard countdown.  After I have hosted a lobby however, other players can join it.  This also shows up in Railjack as the inability to join rooms with a long hang when I try to join a specific zone or the message not popping up that I couldn't join a group for a few minutes after I click join any crew.  After the first failure in Railjack matchmaking all subsequent failures tend to be instant for a while.  I can't test whether other players can join my Railjack since it is currently in a construction timer.  I have also noticed today when trading that all squad invites I send say "Could not deliver invitation to *" but they still receive the invitation and join anyway.  I am not aware of any changes being made to my router or firewall since before these problems started occurring.  Are there any suggestions about what may be causing these problems?