It is very difficult to scroll down the page (the finger gets tired) when the "description" section is open in the task, when the task has a lot of custom fields, when the task has a lot of checklists, when there are a lot of things. Please organize this "collapsible sections" into sections, as for "updates" and "relationships". Can you make this an option in the task view settings? I believe that there are only two working views: full screen and pinned to the right. The "default" view has a lot of issues with wasted space (dimming the back 30% of the screen is bad, because it didn't even save the context). These two views should display differently for different lists, and yes, they should display "Collapsible Sections" differently.
