This shape specifically (black triangle with white lights in each corner and an independent round red ball in the middle) has been reported numerous times over the decades, most prominently presented in the Belgian UFO wave 1989-1991 [1][2], including F-16 chases.

[1] https://fr.wikipedia.org/wiki/Vague_belge_d%27ovnis [2] https://www.youtube.com/watch?v=s7psGj4M1ZI