Meteor disconnects after iOS update

I’m developing a Meteor app, and with the recent iOS update to v10.3 we’re seeing a strange behavior on some of our views.
The problem seems to be that the websocket gets constantly disconnected and reconnected.
I’d like to know if any of you were experiencing the same issue and if you were able to solve it.
I was able to reproduce using Safari on OS/X El Capitan, unluckily it happened to me just once.

Any advice is much appreciated, thanks in advance!

It was an error on our nginx config, leaving this here so it helps someone experiencing any similar issue.