Error of creation of groups in the editor.
Create 144 groups
Create one more group (mistake)
Clean 4 groups
Create 1 group - it is impossible to create (mistake)
Clean 70 groups
Add 70 groups, empty groups are created
Actions for the following attempt to create and clean groups
lead to an error of creation of groups or creates their empty. I didn't try it to do more long, than on video,
but also it is so visible that in a certain step, I lose opportunity to create more than 70 groups.
I reached a limit of creation of groups, it is more than 40 I can't create.
Exit from the editor, loading of the kept mission doesn't correct an error.
If not to try to create the 145th group, the problem won't appear.
In game the situation of attempt of creation of the 145th group isn't controlled, it leads to a problem of loss of the maximum creation of groups to 40. It brings at emergence of a problem into missions.