Hi @kjetilsn, if all the gateways are configured correctly then you may have encountered transient tropospheric ducting.
I have encountered this many times in my past work as an engineer on 3G and 4G mobile networks. Distant (hundreds of km away) UHF terrestrial TV broadcast transmissions appear temporarily and disrupt the 700MHz band. This happens much more than we realise, it’s just not recorded very often.
There are even tropospheric ducting forecasts, such as…