Well actually iOS 13 Safari version is very buggy with WASM or at least call stack size. I just tested with my iPad and even the samples doesn't work because of 2. - Unhandled Promise Rejection: RangeError: Maximum call stack size exceeded. . Also 3. but this is worarounded by the hint you received on another github post with "var Module;".

The only workaround i found at the moment with the current Safari / iOS 13 version is by modifying the blazor.webassembly.js file and add give some time at startup on some delegates. It work on my iPad, but i cannot test on iPhone, i only have an iPhone 6 and of course Apple dropped iPhone 6 support for iOS 13.

blazor.webassembly.ios13.fix.zip

As i have no alternative, i will put it as an "Opt-in" in my plugin (mainly for iOS), but i wish Webkit will work better in the future.

Actually tested my "big" Business app with my patch, and it seem to work.

Originally posted by @Daddoon in #16144 (comment)