Feedback request: a way to safely interrupt a loadsceneasync

I tried to hide long load time with timeline but timeline introduces hiccups so now I'm thinking of initiating scene load async as the player gets near a level button.
For that I need to interrupt an ongoing loading if the player moves closer to another level button.
AsynOperation makes no reference to this particular scenario and since it 's a black box i was wondering if there was any limitation to be known.

 

It doesn't look like this is possible: https://forum.unity.com/threads/cancel-async-load-solved.719660/

 

Thanks. Edited into a request.