I use a Raspberry Pi3 using Librelec 9.0.2
Until recently the Filmon addon has worked perfectly.
Nowadays it buffers/freezes or drops out completely every few minutes.
I can access it perfectly using the filmon app on my ipad or on my Windows 10 laptop via the Chrome browser so my internet
service is not a problem.
However, I have the same problem when trying to access Filmon using the Chrome browser running through Raspian.
Filmon support doesn’t seem interested and simply say they do not have an app for my device.