Thanks, will check it, maybe can with scripts do it (or will write new AI)
Thanks for your bugreports)

Will try, thanks.
Might be able to play later and will make ascreenshot if the AI switches sides again.
But basically in both matches that i played, it was a 4v4. The Allied AIs that were basebuilding switched sides to hostile after some time when they were attacked.

Maybe you can switch off the ability to give up/surrender and switch sides for any AI.
This is activated by default in skirmish and maybe you need to turn it off manually for your custom scenario.

Then it will be empty slot (in that slot AI exist but unseen, i will report to game developers)

Thats visual bug, use your mouse and go on black space where must be player and click RMB

Now tested i can

You cannot switch the slot and then add an AI in Online.
If you add AI players and then switch to the second slot, the first one will stay empty and cant be customized anymore.

Borrs, yes, it is possible to play vs others on multiplayer, also AI works too

Bantkreuz - you can switch slot the slot and add after AI, so with that you can play by other slots + if you host in singleplayer there will be full lobby of AIs, change slot and they take all other slots (because scen maps)
About surrendering AIs, in maps uses standart AIs, AI that using in main game, and the same heroes AIs, if they surrender... than will be need to write own AI. About switch the sides, can you share screenshots in discord server? You can tag me like @Asura[HMS]

discord server of The Scouring https://discord.com/invite/9eSrACUgcd

is it possible to play vs other on multiplayer?

And the visibility seems to be limited. Dont know if its currently possible, but you cant see your allied heroes. Shared vision would be good so when i play the basebuilder, i can see what my allies do.

Also in Multiplayer it seems to not be possible to switch the slot for the first player. If for example i load the map HVO Last Heroes battle, im in slot 1 and theres 5 empty slots and 2 scenario AIs.
If i add all AIs and then switch the slot, the first one stays unoccupied. Maybe you can fix that.

Not sure whether intended, but the AI allies just give up even though they have a base and running economy.
They just give up at the first attack on their base and they dont just give up, they switch sides.
Thats only for the basebuilding AIs.
It was going quite well for me and my AI base but it just switched sides and i was spawned inside the now enemy base with tons of units.
The default shoud turn the options "Allow AI to switch sides" and "Allow AI to give up" to not allowed.