So far this has worked 100% for me for vendors, opals, reviving, healing etc.
The Bug occured sometimes when players were holding E to gather Opals, to revive, using aether vents etc. The meter would run full when holding 'E' but there wouldn't be any action resolved. It stayed full and you didn't revive, didn't heal and so on.
Yesterday I found out it has probably something to do with the players movement. When standing still before pressing and holding E, every time it worked. I could provoke the bug by pressing it too early again.
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