Can you check if this problem is still occurring in latest ubuntu version (network-manager)? if this problem persist please attach a Backtrace log for network-manager, you should see further information at: https://wiki.ubuntu.com/DebuggingNetworkManager
Can you check if this problem is still occurring in latest ubuntu version (network-manager)? if this problem persist please attach a Backtrace log for network-manager, you should see further information at: https:/ /wiki.ubuntu. com/DebuggingNe tworkManager
Regards