Playing technique not visible on slashes

When I add articulations or dynamics to slashes, they are visible (as expected).

However, when I add a playing technique to a slash, it is not visible. When I delete the slashes, the added playing technique becomes visible (“sim.” in this case)

I can reproduce this on any bar with slashes with any playing technique, and also closing/opening Dorico doesn’t help.
So it seems for some reason the playing techniques is hidden.

Why is that?

Note that in an instruction video on the Dorico channel it is added without issues:

I found the solution. I have to set “Show other voices”