Zero fish at fishing hotspots in Orb Vallis, and Cambion Drift

[Turbo_Trotldyt_R-Zone_64]

Took Oxylus with Scan Aquatic Lifeforms with me. I hunted for Charamote and Longwinder. I found that half of the hotspots in caves had ZERO fish. Yes, the water had hotspot special effect and SAL showed fish icon on map. Why mark as hotspot if there is ZERO fish? Same for all water sources outside. When I do find a hotspot with fish, the spawning script breaks after some time. I noticed spawning will also break when changing from warm to cold. This is a year old issue. Still unlooked at. I don't like this premium feature, even if for free!

Oh yeah, same issue in Cambion Drift. Probably on Earth too.
In CD, sometimes when do find fish, and when I go near enough to catch, they all hide away, out of reach. And when I try to follow them they just despawn. Like, wth!

I remember when fishing was a relaxing activity. Now it's buggy nightmare too!

As I understand it has something to do with map unit limit. Well, there's too much garbo walking around in all those worlds, especially in CD where's just way too much.
The same limit also prevents vombalists from spawning properly when trying to hunt eidolons...