Gate in Delirium Map won't open

I ran into a trouble. I went through few areas on map, I clicked to start mechanic, backtracked to previous area, I killed adds and gate automatically closed. Now it wont open at all. Items are on other side, my shards I collected are basically lost at this point.

FYI playing SSF so I can't invite anyone and teleport to player.

Any ideas?
https://imgur.com/a/Cotg2oS