Mechs left in vehicles sometimes disappear

[ghost]

Describe the bug

Pretty much as in title, I haven't done extensive testing on this but it did happen at least three times now, all in very similar circumstances.

Steps To Reproduce

Now, I haven't figured out exact conditions but it goes something like this:

Find a Mech, swipe milid card and happily ride it out to your vehicle.
Swap places to force it on passenger seat for ease of transportation to the main base.
Walk away and do something else for a while - couple overmap tiles should be enough.
Come back to your vehicle and likely be very puzzled about the Mech's mysterious disappearance despite no signs of malfeasance of any kind.

Expected behavior

Mechs not evaporating when left in vehicles.

Screenshots

Versions and configuration

0.C-47743-g38a3cdcc88

Additional context

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. Please do not 'bump' or comment on this issue unless you are actively working on it. Stale issues, and stale issues that are closed are still considered.

[Night-Pryanik]

Closing as stale, since stalebot can't do this by itself.