They can potentially see new Sanctuaries, if they have the necessary detection. If you hover over the "cloaked ship" symbol in the system view, it will show you who has discovered your Sanctuary already.

If this happens to you again, please share the save so we can take a closer look.

The-Cat-o-Nine-Tales wrote:

They can potentially see new Sanctuaries, if they have the necessary detection. If you hover over the "cloaked ship" symbol in the system view, it will show you who has discovered your Sanctuary already.

If this happens to you again, please share the save so we can take a closer look.

Great! Will do so. Thanks.

one of the Sanctuary tooltips (I forget which, it took me forever to stumble upon it) mentioned that the sanctuary cloaking level is equal to the amount of sanctuaries in the system. So more planets with sanctuaries makes them harder to detect via the usual anti-cloaking measures.

Not to say they're impossible to detect via other means; if one is discovered through hacks, that would do it too.

dragontyron wrote:

one of the Sanctuary tooltips (I forget which, it took me forever to stumble upon it) mentioned that the sanctuary cloaking level is equal to the amount of sanctuaries in the system. So more planets with sanctuaries makes them harder to detect via the usual anti-cloaking measures.

Not to say they're impossible to detect via other means; if one is discovered through hacks, that would do it too.

I remember reading this somewhere as well.