Descriptive Audio (NAR)

I’m using TVH 4.1.2401 and LibreElec Client v8.1.108, amongst TVH clients on iPhone etc. and find that some shows either live or recorded default to the NAR descriptive audio streams. This can be toggled in Kodi and the TVH app, but I want to default it to off / English if possible. I found this: https://tvheadend.org/boards/5/topics/18961 but I don’t have that Audio Stream Filters tab, maybe because I’m using a Digitbit R1 Sat>IP box. So I can’t see a way to default the audio stream to ‘english’.

Anyone had and solved this?

Thanks