Since recent plasma 5 updates in stable, I can not see the activity manager icon properly. If I change theme to breeze it looks like some horizontal black lines with dots. Unfortunately in oxygen-thene it is either so dark, that it is invisible on dark task bar, or simply missing. Before recent plasma updates the icon was showing three colorful dots forming horizontal line (red-blue-yellow).
Now it looks like this:
The icon was present in place of red-marked rectangle before recent plasma updates.
Operating System: Manjaro Linux KDE Plasma Version: 5.17.3 KDE Frameworks Version: 5.65.0 Qt Version: 5.13.2 OS Type: 64-bit