Mine is broken?

Hello.

Why can't I use the Crawler (machine) in someone else's mine?
Yesterday, a friend and I were digging his mine, and when he used the Crawler to fly back to his mine camp, I remained where we had arrived.
I couldn't use the Crawler or join my friend in his mine camp. And the portal to it didn't appear either.
So, what was happening? If he starts a mine from his hideout, a portal to his mine appears in his hideout.
We start digging, and then there comes a point when I run out of torches and need to refill them.
But I can't teleport to his camp and refill them. I had to restart the game because there were no other ways to exit his mine.

Please tell me what we should do? Why does this work? About two years ago, when we were playing and digging, everything worked as expected, portals appeared, and the Crawler was available for use.
And one more thing. Previously, there was a return to the shelter button in the crawler menu, but now it's gone, forcing you to return to the mine camp and use the portal manually. It's become inconvenient :(

Are these some kind of major changes that worsen gameplay?

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