Misbehaviour related to Refunding on KSP >= 1.11.0

[Lisias]

Fellow Kerbonaut Kor reported on Forum:

I'm playing 1.12.3 with JNSQ and Tweakscale but otherwise a pretty minimally modded setup. I'm running into a problem with stackable cargo parts (struts, fuel ducts, small solar panels, etc.)

• If such a part is launched in a cargo container, it remains stackable until placed "in the world." Then it is no longer stackable.

• If such a part is launched as part of a craft, it immediately becomes non-stackable.

Testing revealed the problem is unrelated to JNSQ and/or TweakScale, I could reproduce the problem on Stock.

Further information about the M.O. and possible causes are Work In Progress.

[Lisias]

It's a bug, but it's not my fault as the misbehaviour was introduced on a new KSP feature (the Inventory support).