I don't know if it's a Construct 3 bug or a "gift" from an Apple, but all my games stopped loading on Safari with iOS latest versions (I tested on 11.2.2 and 11.2.5). This happens somewhere around 28% loading, and I realized that it's connected with preloading sounds.
So if I unchecked "preloading sounds" - the game is loaded, but there are no sounds. Back in early January, there was no such problem, so I associated it with iOS updates.
In the end I tried to add .m4a and the game started to load again with working sounds. It turns out that iOS no longer supports opus audio or this issue can be fixed?
Maybe I'm the only one who ran into such a problem?