Loading Stream ressource = could not make hardlink for = Timeouts

I have found an awkward Bug/ Issue with fxserver.

Server OS: Debian 10, all packages up-to-date
Server type: Hetzner Dedicated

Server CPU: Ryzen 5 3600x 12x 4,5GHz (4% used with 50 players)
Server RAM: 64GB DDR4

FxServer artifact: 3276
Onesync = enabled(infinity, without beyond)
Using an Nginx-Ressource Proxy: yes
Config Options:

set onesync_forceMigration true
sv_endpointprivacy true
sv_requestParanoia 1
sv_enhancedHostSupport true

Ressource Count: About 120, Very well Optimised, ESX based
Script Count ~ 90
Addon Count ~30 (~20 Car-Mods, some with max. Yellow Size warning; ~10 mlo’s, no size warnings.)


My Issue:

If i start up the Server like normal, the first asset loaded gets a “Could not make hard link for…” Issue. No matter what type of asset it is. (car, map, hair style, prop, etc.)

If the server IS started with assets, new Players & random alredy Connected players get the “timeout after 60 seconds” error pretty much random with no affect on what they are doing.
Pings of other Players are pretty stable if someone times out (normally below 100ms)

we also get the hardlink error when the server is fully started up without any asset and then start one.

If i remove all assets from the server, I dont get the hardlink error. AAANNDD Players dont seem to be getting the Timeout issues no more.

I tested both 1 day and with about 300+ Players Total to verify this.
No firewall was activated at any givven time during my testing.


May the File Ownership & Permission settings be an issue? Or Which Server-Account started the FXServer? ( i always use root, all files are owned by root and have 777 permissions)

Another thing is: May an _ or numbers be an issue which could be causing this? OR maybe the map proxy ids? (set to start at 2000)
Or are ressources which could not be found be an issue?

Maybe someone knows any fixxes or stuff to try. i would like to fix our issue.

BTW
No, we dont get any errors in the Console.

Did some further testing and found that even with EVERYTHING removed i get the hardlink error.

Minimalistic Config design, tested with onesync disabled, no other ressources than this 1

# DB connection string
endpoint_add_tcp "0.0.0.0:30120"
endpoint_add_udp "0.0.0.0:30120"





#GRUPPEN

#EINSTELLUNGEN



fileserver_add ".*" "PROXY"
adhesive_cdnKey "PROXY_KEY"

sv_hostname "test server"


sv_maxclients 64


set steam_webApiKey "MYKEY"


sv_licensekey "MYKEY" #EgoRP Key



Error seems to be Debian-Related.
Tested it on My Windows 10 Pro PC, no errors at all.

nope not so far

Anyone have any more info on what could be causing these hard link errors?

I am able to create the hard link manually but fivem doesnt seem to recognize that.
Just to confirm, what is the file extension on stream_cache files?