When dying right after completing a delve node I cannot go back there / loot is lost.

As said above, I if complete a node and die immediately after I return to the mine encampment where clicking the respective node on the delve map does nothing. It does not teleport me to the node although I just completed it.
The only way to get to the node is to click another node and walk there, or leaving the area completely (e.g. hideout) and then porting back to the node.
Anyway the loot is lost.

https://imgur.com/a/WpH6WIq

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Abdiel_Kavash wrote:

This is intentional. Dying in Delve resets your progress.

Ok, so completing a node is not counted as progress until, let's say, a few seconds after the event was finished? Because when I died it was within the first second after loot started to drop.

The node should be completed on your map, you should be able to start new delves from that node now. Death resets the instance, thus eliminating the loot.

Wich is the dumbest thing considering the amount of almost unnoticeable after effects blocked by the amount of loot tags floating around. Unclear of what kills you is the norm in poe.