Via preview isn't working

Hi,
I hope it’s just a wrong setting, but when routing and placing a via, then the via isn’t shown:


When I keep on routing, the via still doesn’t appear until I finish the track:

When I drag against an obstacle, I see that the live DRC shows the conflict with the via and highlights it green:

Do you have an idea, what’s going on here?

Cheers,
Hannes

Make sure you’re using “Accelerated graphics” in Preferences: