Can no longer decode AC3 audio from MTS Video cameras

One of my new projects is using 360 VR video, feature only in CC 2018. You (Adobe) advertised this with great fanfare so it's not like I'm unnecessarily updating. I tried to raise this issue in a thread because I want to use 2018 (hey I am paying for it) and I thought telling you about it here might help.

Honestly everytime over last decade that I've tried to lookup help on these forums they're just full of people going off topic or unwarranted arrogance from the 'pros' who have absolutely nothing meaningful to contribute other than bitter retorts, it's very frustrating to trawl through when you're looking for a solution not 'banter'. I'm trying to raise a genuine issue and being told "well durrr it's not updated yet", I know that but if I don't report this issue how do you know to fix it in the first place? Wish I hadn't of bothered. I've given up on this thread, no further response required and I've marked as assumed answered.

Here's an some actual meaningful information for anyone searching these threads with similar issue with AVCHD:

After over an hour of Adobe remote/looking into the issue they've tried everything (checking permissions, checking QT codecs, checking adobe preferences, trying diff MTS files) and concluded that indeed Premiere CC 2018 can't read audio from my Canon XA series / AVCHD / AC3. I am waiting for dev team to follow it up over next few days but finally progress in that they've acknowledged the issue and have escalated it for me.