I Think it was the 1.78 but in the past i have the same issues when i was plaing hollow knight so i try to upgrade the fw in that situation... Should i do the upgrade?What FW are you on?
I wouldn't worry about the 4.4mm connection if you've been using it the whole time with no issues. Some of those reports are legitimate, but some could possibly be attributed to user error (i.e. as it was in my case, I hadn't fully seated the connector the very first time I plugged in my headphones into that jack -- and some of the issues described were exactly what I had experienced with the connection not being 100% seated).
I add that i try to close the topping tune app on Windows after that issues and the problems looks like fixed but maybe it can also be a coincidence