I think you received the new stick with the Sony CXD2837: Only one frontend was found. A kernel patch is needed: seeAuzeuner DVB-T2 (Astrometa 2018) driver update #567 https://github.com/torvalds/linux/pull/567/commits/24ab0be682b16911efcbac271... I have one of those running since yesterday with good results with DVB-T2.