Buttons not responding to taps

I have a fairly complex view (nested 5-6 stacks deep) that is navigated to from another view. This complex view contains a custom view (with gestures attached), half a dozen buttons, a slider, a couple of pickers, a toggle, and a couple of steppers. Everything is working as expected on both iOS and OSX, *except* 5 of the buttons. These do not respond to presses (or TapGesture if attach one that prints a message), *except* in 2 cases. (1) if I click on one of the buttons a lot in different spots in its frame, eventually it seems to get a click (100+ attempts hammering the mouse or tapping the screen). (2) on OSX if I resize the window horizontally by a considerable amount, the button in the bottom left corner starts working as expected. Suspecting some sort of an "overlap" issue I've gone through the whole view heirarchy drawing the view frames and adding TapGesture with prints, but failed to find anything that might be stealing the buttons' taps.


What could be causing my buttons to not get their clicks?