Maps disappears on Firefox

Thank you for this very useful plugin. I use it on some sites.

On this one:
http://www.foropraxi.gr/epikoinonia/

the map disappears on Firefox. When I zoom in or out or on some other actions it appears for 1 sec or so.

I checked the object error (see console). It has to do with woocommerce been installed. I commented the code, the error went away, but the problem was still there.

Any tips?

Thank you in advance.

Spyros

https://ww.wp.xz.cn/plugins/leaflet-maps-marker/