Notification applet in mate-panel has weird icons

Support & Help Requests
1

Hi! I just installed Ubuntu MATE 18.10 and so far absolutely love it! But after I changed in MATE Tweak panel theme to Pantheon, some icons in notification applet looks weird!
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How do I get default fancy icons?
Sorry, if this question is too stupid, I’m completely new to this!

2

Icons are typically different in different themes. I suppose you could create a custom theme using whichever theme Pantheon uses as a start and pull in icons from other themes.

I would look in /usr/share/icons to see icon sets for different themes.