ZEUS erratic behaviour

[General Von Television]

Bear with me if this has been discussed already [eventually just point me to the thread]: I'm editing some single player scenarios using Alive too and I also need to be able to use ZEUS Game Master to add vehicles, equipment, supplies when needed, besides being aware of what AI is producing.
When I test the mission from the editor and press [Y] I usually get the whole menu: Zeus is set up to load all MODs and the owner is set to #adminLogged (I know this should be used for Multiplayers servers but even if I sync to the player or make it own by the same there are no changes).
And so I export the mission to Singleplayer and now I get the issues: after loading the mission and activating ZEUS I sometime get it to work with all the factions, but often I remain without the RED or BLUE factions, and with limited options.
For example I cannot select a vehicle or unit and move it to another location.
Sometime I reload the mission in the Editor, save it and export it without any changes, and ZEUS is working...

I'm puzzled! Any help or advise will be most appreciated. TIA

[General Von Television]

As an update I've tested this is happening only on Altis, and never on Tanoa or Stratis: I start to think the disappearance of RED and BLUE factions from the ZEUS interface may be caused by having reached a limit of some sort for the deployed units even if Alive will spawn only a limited number around the player...
Does it make sense? Is there any way to verify and modify this limitation?