Comment # 14 on bug 913339 from Wolfgang Bauer

(In reply to Stakanov Schufter from comment #12)
> I have installed leap as beta and updated to one day before the release of
> RC1. I do not know if the patch is already there. Yes I think this should be
> installed by pattern as most people will not know how to handle the problem.

It's not a patch, it is a separate package.
It wasn't there yet in Beta1, but it is there in RC1 and Current.
At the moment it is not installed by default, you have to install it manually.
Hrvoje submitted a new plasma5-workspace package though that requires it
(thanks!), so it will be installed by default in the final release.

I suppose we can close this bug report then...

> That said: installing with zypper up all the patches you notice that:
> the grafical rappresentation of the networkmanager icon is missiong. A space
> is there. If you join one manually with add object to task bar, it is there,
> works so so but is crippled because does not open the mini popup when you
> click or hover over it.

This bug report is actually about system tray *icons* missing (because Plasma5
doesn't support the old/ancient XEmbed system tray icons any more, only the SNI
protocol that got introduced in 2009 already), not system tray plasmoids. I can
confirm your problem, but it's not specific to plasma-nm5, it rather can
randomly happen with *any* plasmoid it seems.

I mainly see it with plasma5-pa here, but have had plasma-nm5 missing as well
already.
Btw, if the icon shows up (also if you make it show up via enabling/disabling
another plasmoid), it should work normally and not be "crippled", at least it
does here in 13.2/KF5.

Anyway, this is a known problem, and is currently being investigated upstream:
https://bugs.kde.org/show_bug.cgi?id=352580