network issues - on line update and others

For the last 2 days I’ve had trouble with (just)

Yast on line update and software management hang at random
spots wile refreshing (downloading) the repos data. Sometimes it
hangs on the “update” URL, sometimes it hangs on the “oss” URL, etc.

Now the main page ( hangs
at random when clicking any of the links (“Get it”, etc.)

I see msgs about waiting on (it hangs), and one
msg about the server’s certificate being invalid.

Any one else having these issues?

My internet is fine for all other sites.