Skype on multiple devices has been in ruins for years. I'm not sure why, but being 'active' on two different products causes absolute meltdowns. Calls you can't answer, no sound or no video, the second device ringing endlessly after the first picks up, and anything else I can think of.
I feel it has gotten better recently, I've used Skype as a phone replacement ( with an actual skype number and in conjunction with google voice for sms) for a few years now, and currently run it on two laptops and two phones and haven't had issues for several months (I did have problems when I used it with android a while back, but have not since I no longer use it on that platform).
Interesting. I'll have to look into whether it's improved, or has Android specific bugs. Most of my multi-device experiences have included android, and that's reliably been the worst situation.
For reference my devices with skype installed are my personal phone with win 10, my development phone with ios, and win 10 / osx laptops. I also have a (5.1) android for development, but no skype on there.
I use the app version on win 10(anniversary) not the desktop. Don't know if that makes a difference but works fine for me. Even talking across the great firewall of china works fine surprisingly.
Even text messaging on multiple devices is a disaster. If I have Skype running on a PC and an iPhone, the phone app will almost never receive new messages.
