Steps to Reproduce

https://zkfiddle.org/sample/3ughqrk/1-ZK-4956

macOS only.
System Preferences -> General -> Show scroll bars
Try setting "Show scroll bars" not "Always".

Open the test page

Current Result

You can't scroll horizontally and the frozen component is missing.

Expected Result

You can scroll horizontally.

Debug Information

The scrollbar overlay is hidden if not scrolled.

Workaround

Set "Show scroll bars" as "Always".