Product and version:
FileMaker Go 16.0.3
OS and version:
FileMaker Go (iOS 11) fails to open a new Card Window in full window width, no matter if you use the Get(WindowWidth) function, the Get(ScreenWidth) function or any manually set width.
On an iPhone 6 with a 1334 x 750 resolution the maximum width is 335 pixels, where it should be 375 pixels.
Same effect on older iPhones.
This has nothing to do with the "fixed zoom bug" reported here: Anchors / dynamic layout fail with iPhone 6
since removing that script step has no effect whatsoever.
How to replicate:
See my example file: type in any number greater than 335 into the dialog.