Guild Wars 2

Sometimes when you’re done being launched by the Oakheart’s Essence, the glider doesn’t work. This mostly happens because you touched the ceiling or a wall, and are being shot straight down. At this stage your character is unresponsive to everything, so it’s not just gliding that work, but rather, all control is lost. Worse is, it sometimes causes falling damage, too, which usually kills you

Amaimon.7823:

Sometimes when you’re done being launched by the Oakheart’s Essence, the glider doesn’t work. This mostly happens because you touched the ceiling or a wall, and are being shot straight down. At this stage your character is unresponsive to everything, so it’s not just gliding that work, but rather, all control is lost. Worse is, it sometimes causes falling damage, too, which usually kills you

I don’t see that as a bug — long before Oakheart’s Reach, if you glided into a wall, you’d stop gliding and fall (and become briefly unresponsive). I just consider it reason to be careful about where I point my fingers.