Returning to current node fails to maintain Delve instance if mine cart isn't present

Love that I can now click on the current node to get back into the mine, but it only works properly if you're trying to return to the node with the cart.

If I run from the cart (back along the cable) to another node and port back from there, trying to return from camp by clicking the current node will kill the instance.

Further investigation has revealed that if, after running the cable and porting back to camp from a different node, I then try to click the node where the mine cart is (but where the current location arrow no longer is), I will unexpectedly be ported to the node with the current location arrow, and the instance is maintained.

From this, I surmise that, for some reason, the "current node" behavior checks for clicks on the node with the mine cart, instead of the node with the current location arrow (despite always porting to the current location arrow).