Your excellent ZH OpenStreetMap has been working perfectly for a couple of years now at dreamwoodinternational.com
A few months ago however, I realised the maps were displaying the 'spinning wheel' instead of the markers on any map within my website.
All updates have been applied and the only 'significant' change I recall making in the past 6 months or so was removing the Jomres Booking system - I am wondering if I was relying on it to provide a JQuery function or similar - but I am really clutching at straws with this theory.
If you could shed any light on the problem I would be most grateful - using your maps was the highlight of my website rebuild I did in January 2018.
My browser (Opera) shows the attached error (Capture.jpg).
If I use say Chrome as the browser, the spinning wheel also appears.
Using Firefox has the same problem - see attached FF error details (Capture-FF.jpg)
Please let me know if you need any more info or back-end access.
You are right, in some cases JQuery Ready Event is more preferable type, and in next big release I'll change it to this value. But in most cases initialization type with problems only cause empty map area, ie there is no any map. But spinning circle shows that there is some errors in map code, in this case you need to analyse browser console for errors.