After returning two or four times, the asteroid and lunar mining ship don’t return. This happens in 1.7 and 1.12.2

well, lookes like my world was kinda corrupted, I tested it (in another world), it did its work, ill see if there are any issues considering I just launched it

The only two satellites I have are the surfacing mapping and death ray ones. I did spend quite a bit away from the chunk and did leave the world a few times

If that is the cause of the ship not returning, is it possible for the devs to fix it?

restarted the world?

Please, ensure that the storage isn't full, tip: you can place double chests in each sides of the cargo to store the items

The storage was empty, I put everything in a chest, yet it never came back

Yes

It may be an isolated error or not, i'm not sure of what's causing this, maybe try creating a backup and relaunch the soyuz for test.
i hope you find out how to solve it's issue

The mining ships have been tested for several hours at a time, working just fine. Did you unload the chunks or leave the world before it stopped working? Or have you launched any new satellites?