The level 1 Priest spell halt applies a stuck effect of the same duration (12.5 seconds for the BB priest) regardless of whether the effect is a graze, hit or a crit.

 

 

Confirmed with video.

 

 

(In the combat log you can see that the Halt I cast before the one I recorded was a graze for 12.5 sec)

 

Also the VFX for Halt lingers for a few seconds after the spell ends. It should disappear immediately (also the FX is way too over the top, should just be something around the unit's legs or something).

After doing more testing, I have discovered that this is not limited to just the Halt spell. I will make a new thread about it.