Inspecting occlusion data freezes Unity

Tried to watch the occlusion data (baked in another session), and it froze like this.
Closed Unity, reopened.
Went again on the same file, same exact story: minutes and minutes like this.

7619038--947197--upload_2021-11-1_9-13-33.png

Inception for the win.

7619038--947200--upload_2021-11-1_9-14-24.png

Oh, before there were only 4 tasks, now we have 8:

7619041--947203--upload_2021-11-1_9-15-7.png

And it indicate a very high activity, though the hard disks are not moving.