Loading scene progress bar

For years Ive been doing basically

https://www.patrykgalach.com/2021/02/15/smooth-scene-loading/
https://weeklyhow.com/loading-bar-screen-in-unity/

this is all well and good, the bar updates usually (sometimes it just jumps straight away to 0.9)

The problem is after it reaches 0.9 it then freezes for like 4 seconds, where nothing is done, its impossible to update the progress bar

after these ~4 seconds the apps surrenders control to me again, so my function OnLevelFinishedLoading(..) gets called

Could it be that my scene is a lot more complicated than the above scenes in the 2 examples, i.e. if I load a simpler scene in my game then theres not a 4 second delay its near instant.

i.e. progress bars look good if the scene is small which begs the question, if your scene is small and loads quickly then why have a progress bar

 

Avoid complicated code in Awake, OnEnable and Start, as all of those functions run synchronously when you load a scene.

 

OK thanks I don't think its that but I just had a quick check now just to be sure

Sorry I had a bit of a brain fade I should include the profiler info of the frame


you can see here it freezes for ~5 seconds
if my scenes a bit smaller eg ~5% of the size ~20% the polygon/material etc count (i.e more dense) there is no pause i.e. the frame takes ~10msec vs nearly 500x slower here, sure its larger but no where near 500x larger