Frozen Units not being airlifted

Hi- my "Slave" Zander on WG has had about 6 Airwings being airlifted now for about a 3 weeks and seems to be frozen. I was trying to bring them back from a "Battle" and now they just hang there and I can't do anything to fix the issue. I am not able to Disassemble, resupply or even continue transporting them. My Air Transport Units are either "Idle" or they transport other units that I send around my Empire with no problems. I am noticing these Air Units are under supplied, but until I get them back to Home base (it's been 3 weeks now), what else can I do? Nothing has worked to clear these Units. Thanks.

Go to the unit and switch its supply to air drop instead of land based. Then increase their supply by a few points to trigger a resupply. Then hopefully they can get supplied enough for an airlift. Units have to be near full supply for a lift.

These particular units (Airwings) will not even allow me to change Supply levels or Air Drop. Every other unit has a "Supply Unit" icon under the Supply category- but these don't. As soon as I try to even change the Supply levels, the game tells me I can't supply while the Units are in transport. I wish I could just delete them and start over, but thats not even an option.....

I am not sure I understand this:

These are air units? stuck there without supplies?

I looked into the country.
It looks like these are air transport units.

There is another discussion on the forum about these units not being supplied.

they do supply when you give them a mission.

I promised to have this resolved
In the mean time, try to give them a mission.

When you currently look into such a unit (example: Air transport 4)
it shows on the unit details page that it will supply if you give it an assignment.