This behaviour occurs only in the sandbox environment e.g. testflight, ad-hoc, developer signed builds and it works correctly in the prod environment(app store build)

I came across the problem when I created a xib inside an spm package, it seems like that Xcode uses a broken xib template. I resolved the issue by opening the xib as source and replacing the document and device tag with the following code: <document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="16097" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">     <device id="retina4_7" orientation="portrait" appearance="light"/>