[2.3.2] cannot remove empty space?

Long time lurker/user, first time truly confused.

Everytime I zoom out, then in, Audacity just adds a bunch of empty space. (Not silence, despite what Google keeps suggesting me…) Even if I try to delete it all, a bit always remains!

Main question: how do I remove the empty canvas?

If you select All your audio, (“Ctrl”+“A”), then click on “Fit selection”, there should be no “empty canvas”.