Invulnerability glitch

So I was playing heliophage with attikus trying to crank out the “In his face” lore challenge and I got 300 overshield most likely from a pickup early on during the level. Interesting thing was that this overshield didn’t take any damage and didn’t ever wear off until Rendain juggled me off a cliff, I even stood in damaging fields to test it and absolutely no damage was taken. Hopefully this bug never occurs in pvp.