battery drain

I bought a 2018 Honda Civic Touring in March of '18. I have a few odd things happening that I'm either being told are 'normal', or I'm just not sure I should invest in upgrades. So I'm hoping that others with the SAME year, model and trim as my car can see if these things happen for them, too...

So, ever since the day I got my car and installed HondaLink so that I could stream from Aha, I've been plagued with the mdnsd battery drain issue on my S5. This is a known issue for some apps (firefox and a few games) - none of which I've ever had installed on my phone. It seems to happen when I...