UV version: 4.1.0
I'm submitting a:

• bug report => please fork one of these codesandbox examples with a repro of your issue and include a link to it below
• feature request => please use the user stories repo
• support request => Please do not submit support requests here, use stackoverflow

Current behavior:
I'm seeing an issue where the OpenSeadragon behavior that causes the overlaid controls (zoom in/out, etc.) to behave inconsistently -- sometimes they fade out after a period of time, and other times they are locked in place and never fade away.

Expected behavior:
OSD fade-out behavior should be consistent -- either it should always happen, it should never happen, or the rules that cause it to conditionally occur should be well-documented or configurable.

Steps to reproduce:

When I go to the current https://universalviewer.dev/, I'm seeing that the controls start out in a "stuck visible" state, and they only start fading out after I shrink and regrow the window. I wonder if some of the work we did to ensure that the controls remain visible when in keyboard focus is sometimes being a little too aggressive.