The user on whose account the problem was detected:
Fafnir

Coordinates:
(in private chat please)

Date or time of the incident (according to server time):
ongoin process so coordinates in privat convo please

Description:
I have much trouble with seeing Stations.
I know they are there, but no matter if I send a fleet or just have my Station in the SAME orbit, I can NOT see them, neither in Space, GG view or in fleet menue. (reloading/clearing cache/changing browser didn't work)
But if a Friend sends a fleet and shares this fleet i can see it and interact with it. So I started shooting at it. BUT once my friend recalls, the Station disappears from Space and from flight menu. Even when i'm still shooting at it. My Gun ist still hitting, but i can not see the station. This happens at multiple locations and i even was able to destroy an invisible Station. It's very complicated to organize friends to send fleets, just, that you can spy and controll your GG actions.

Actions required to repeat the problem:
just repeat what i mentioned.
find an unvisible station, jump there/send fleet there.
let a friend who sees the station send a fleet and share this fleet.

Screenshot:
https://prnt.sc/qDPyl1_-Ktub

Did visibility emerge after your friend got up on the coordinates with a defense order?

we tried so far:
attack mission (never arrived) share the flight
orbit defense share the flight

as soon as the flight is share, i can see the station. no matter if his fleet is in orbit or not.

As you can see, the distance between fleets and an not visible object may be different, in one case fleet will see the satellite, in another - not.
For this reason, your friend may have seen and you may not have.
You can read more about the visibility rules in the description at https://xcraft.net/infos/?gid=rules_visibility

i understand this model, but that can not be the explanation.

because how can my friend see it in the first place if the object is in the invisibel area (do pirate ops appear at such distance).

also i have a station in the orbit -> don't see a thing. i add a fleet to defense orbit -> i don't see a thing. my friend sends a fleet to the same orbit on defense and once he arrives i see the station. ( we changed it to attack direcly to the OPS, cause then i do not have to wait for his fleet to arrive until i can make actions with this station)

i sent you the coordinates via PM

Stations for pirates with 100k and higher points do appear out of base visibility range.