NetworkManager is periodically crashing. Is this a bug?

Yast–>network setting–>Global options–>Network Setup Method–> Network Services: wireless card worked great. For no apparent reason NetworkManager became disabled and inactive, which disabled the wireless connection. Enabling and activating it with yast–>Services Manger got the wireless working, again. I just checed the Services Manager, and NetworkManager is disabled and active. The NetworkManager has crashed several other times last week. This problem appears to have started about a week ago after the kernel upgrade.

My work around is to use Wicked Service.

Is this a bug, or am I doing something wrong?

Thank you in advance.