AI continuously overshoots rejoin with group, keeping the group at low speed and altitude

[ColonelPanic42]

In ai fail rejoin behavior.trk there are two groups of F-15s flying from Gudata to Kutaisi. The fourth member of the second group continuously overshoots their join with the rest of the group, which prevents the group from speeding up or climbing due to

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[Grimes]

It looks like a combination of factors. 

 

1. AI flights are bad at getting into formation at low speeds with the forming aircraft going a bit crazy.

2. On direct take-off to landing waypoints the AI seem to have narrow rules for what is in formation before climbing/accelerating, then when they do climb to RTB they seem to do it as individuals and not as a flight. 

3. On direct take-off to landing waypoints the AI maintain a slow speed and ignore any setting to try and change that until the above occurs. 

4. Literally adding a single waypoint with a reasonable speed allows the AI to re-form logically.