All health & armor charge station have a small graphical glitch: during the charge process, “liquid” disappears not as smooth as it does in MOD version.
This happens with every health & armor charge stations in the game, both in SP and MP versions.
I have a related issue. Chargers do not work for me. No depletion animation plays and my stats don’t go up.
AFAIK, this is a known issue related to the latest content patch.
Unfortunately, the only way to fix it is to start a completely new game.
The choppy charger liquid bug is happening to me too