Thanks for your fast and clear response.
Anyway here are the data of the server:
Name:[FR] FIGHT CLAN - No Addons & No Dev Build
Type: CoOp
Mission: [FIGHT_VF] Seizeground_public [revive]
Probably is like you said that the author put things too close to each other.
Thanks for your attention and sorry to for the no-use-at-all issue.
Will learn something more before posting other issue I see.
Best regards
Giulio