It happens to me with villagers and minecarts as well, typically constantly moving ones that are collecting or transporting items.
Yup. Its too fast. I am unintentionally placing way more blocks than I normally do. I simple mouse click on a PC will often result in the placement of 2 blocks.
I'm not sure if it is related to the recent fix for honey blocks, but my slime block launchers are broken. I have redstone that powers a sticky piston with a slime block on top. After getting the new version the other day when I stand on the slime block and power the launcher, I am pushed into the air, but then it is as if I immediately hit an invisible wall in the air.