I don't know what can go wrong.
In last release there are 2 main things
- ajax loading placemarks
- leaflet library (map engine) changed to last version
I checked my demo and test sites. In mobile and desktop browsers. All is OK.
Check browser console for errors. For example, if you are using CDN - check that it refreshed.
As for changes. By default ajax loading is disabled, therefore it can't break your map.
As for leaflet library - go to component options and set "Leaflet version" from Default to 1.5.1. From component version 7.0 default value is 1.6.0
If you set 1.5.1 it will the same as previous version.
If you need link - previous version here
zhuk.cc/files/com_zhosmmap-j30-6.6.6.1-final.zip