Enemy water cannon and wind blast bypasses my rank 9 barrier spikes...

Since when can they do that?!

I'm to clarify this as best as I can *deep breath*

Depending on the angle you set your barrier spikes, it is possible for any shots fire to bypass the spikes as if it was their own and they are one the "firing" end. While players can not do this with enemy spikes, it seems apparent that it largely depends on how the spikes were set up. This only seems to work on enemy's alchemy skills and the even stranger thing is that is also varies with whether or not the spikes were placed before or after they spawned. Enemies that spawn after the spike was placed may or may not be able to shoot through it. This applies to all forms of spikes as well.

Short version: Glitchy spikes are glitchy.

Well the thing is, the last time I used barrier spikes was like... A year ago? And enemies spawned after i put the spikes can shoot through it, and enemies spawned before that can shoot through it. Doing sulfur spider in shadow realm on the 1st area and testing that, it always shoots through regardless, based on their water cannons and wind blasts. Barrier is rank 9 btw.

There were reported incidents of Cerberus attacks bypassing Barrier Spikes because the spikes were set before the Cerberus spawned.