After upgrading to Kodi 19.0 Matrix, I had no sound and my video's would crash about 5 - 10 seconds in, or they would stutter badly.
I found that Inputstream.Adaptive in my add-ons was not enabled. I enabled it, and it's all working fine again now.
My TV is a Sony KD-55XE9005 in the U.K.
I'm not sure if this will affect everyone, but I thought I would post it, in case anyone else has the same problem. I've also posted this on XDA forums
Yeah, the migration from Python 2.7 to Python 3 pretty much broke majority of my add-ons, which were installed from official repo. What a hassle to revert everything back. I understand this migration is necessary because Python already dropped support for 2.x for some time. But they could just leave Kodi v18 there as a legacy app and make v19 a brand new app. Instead, it's now getting review bombed on the play store.