Hi welcome to BI forums!
You should be reporting that to your GSP provider, if theres an issue with your server either hardware or file related then you should be
asking them for help, not here, your not paying anyone here for your server.
Your GSP will know what the issue is, they can access your server and look into it so open a support ticket with them.
Give them as much as details as you can, like what mods your using, whats the mission your playing, when did the issue start, how long does it last, ect,.
Funny i did a few videos on this subject:
Start Your Scenario at a Random Helicopter Crash Site with this Script!
How to setup Random Starting Positions for Players, Vehicles, or Objects!
Start in Random Locations in Your Scenarios!