Meteor website suddenly stops working on iphone!

My website suddenly stops working on iphone (5S, SE, 6S…) running safari or chrome.
The website is built using Mongo DB, Node Js and Meteor. The website is not built using a CMS.
It seems to be a problem with loading date.
So if you are an expert with Meteor Js, et if you have a iphone with you, let me know. It’s important that you have an iphone and not only an emulator, because the problem doesn’t appear on emulators.

Hi, any progress in this issue? I have the same
meteor 1.6, react

We found a solution if you need