notification button label inconsistent

[hello at gescha.net]

Hi everybody,

KDE Plasma: 5.16.4
KDE Frameworks: 5.61.0
Qt: 5.13.0
Audacious: 3.10.1

I'm using audacious with the default notification plugin. On song change the 
notification has two buttons,  Pause and Next.
https://i.postimg.cc/YqJZfNwD/screenshot-20190920-200854.png

But sometime (idk when, Number of Lines??) the Labeling is switched to Next 
and Pause. But the Function stays the same. So, clicking on Pause plays the 
next song and vice versa.

Does anyone have the same problem and know a solution? Notification Plugin 
works well with XFCE. So I don't know if the problem is KDE or audacious.

Thanks, Georg

PS:  juke doesn't support streams, does it? Is there any other __lightweight__ 
Prog like audacious for KDE?
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