Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1050 Ti with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 417.35
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: rBf1aa4d18d49d
Short description of error
If I have objects in hidden collections, and isolate an object from a visible collection, it turns off the visibility of all other objects even in hidden collections.
Exact steps for others to reproduce the error
select light and camera and move to a new collection.
Turn visibility off for new collection.
Select the cube.
Make several duplicates of the cube.
Select around half of them and move to a new collection (now we have 3 collections).
Turn off visibility for that new collection.
Select one of the remaining visible cubes and press Shift+h to isolate visibility.
Turn visibility back on for the hidden collections.
Nothing reappears since they are all hidden.
This issue doesn't exist in 2.80.