When you walk on asphalt the effect speed two is applied to the player, but in the current implementation the effect particles are also displayed while standing on the block. It would be a nice quality of life feature if they were hidden. In vanilla you can hide them when you apply effects with commands, so it should be possible to pass a parameter into your addStatusEffect call.

Alright, I just pushed an update to hide the particles. I will implement this into 1.0.8 along with the other two issues you opened. I don't want to release four versions back-to-back haha. If you want the changes right now, you can download the jar from the most recent GitHub actions: https://github.com/Andrew6rant/Workings/actions/runs/1039120957