This is really curious. Interacting with select inputs seems to hide/show address bar based on 'perceived scrolling' by the browser.
I understand the behavior for normal content related page scroll, but it doesn't make sense for the address bar to hide/show based on scroll direction when a select input is being interacted with. This is on ios 15.x and while the example below is on an emulator, the original 'bug' was caught on an actual ios device.
Changing scroll position via JS seemingly does nothing in this case, nor does updating overscroll-behavior or touch-action css attributes on the dom elements.
Here's the behavior in question:
