I have this issue with my new 2021 16" M1 Max MacBook Pro. It's connected to my Pro Display XDR, which I usually use something like SwitchResX to use in HiDPI mode at 3840x2160 on my previous Intel MBP. Now the ability to use 3840x2160 in HiDPI is not accessible in any such 3rd party resolution app.

My view is inside a sheet() if that matters

I use PageTabViewStyle() in my app and now when building in Xcode 13 beta and testing on an iOS 15 device, I get a crasher with this line. No issues when testing on an iOS 14.6 device. My app's build target is iOS 14.5 My crash shows this in logs. Removing just the .tabViewStyle(.page) or .tabViewStyle(PageTabViewStyle()) line (i've tried using both) stops the crasher. Simultaneous accesses to 0x282d8b750, but modification requires exclusive access. Previous access (a modification) started at SwiftUI`<redacted> + 72 (0x188b4e60c). Current access (a modification) started at: 0  libswiftCore.dylib         0x0000000185619790 swift_beginAccess + 576 1  SwiftUI              0x0000000188b4e5c4 <redacted> + 72

Thanks, that must be it I use Firebase. It looks like they have fixed it.. hope to see it released soon.