Thanks David, you’re 100% correct !
A jumper is usually 1/2 or less. So let’s assume 7dB/100m. Including the connectors and bends, that’s about 1dB loss.
But yeah, Ali sounded alarmed by 13m, but that’s really not much actually. And the “tone” of the post made me not evaluate properly the value “13m”. Weird 🙂