See WWDC 2018 session 228. https://developer.apple.com/videos/play/wwdc2018/228/ When CPU is above 80% for 3 mins when in foreground. 1 min when in background.

I was wondering if this issue was ever resolved. Currently we are working on a VPN app using "TunnelKit" and we are seeing delayed reconnects with the exact same hasBetterPath related messages. All code is opensource. I don't have a precise reproduction flow yet though.