This bug is a common bug that has been in the game for a very long time, (more than a couple of months) and it causes your UI to display 100% hp when you in reality have 20%.
There seems to be a bug between overload and elemental weapon that causes your health to desync, tested with only overload and only elemental weapon and got no desync. The only way to fix the desync is to die or take enough damage so it refreshes your health bar.
There are also different skills that causes health desyncs, snipe is one of them but i dont know how that works so i cant give any info on that one, might just be lag. And the guard skill from support skill line causes your health to desync if you are guarding a friendly player that takes alot of damage while still surviving. After a while your health bar will be stuck at 100% and it seems like you take no damage when you are guarding them.
Heres a video showing overload + ele weapon health desync me and my friend created.
https://www.youtube.com/watch?v=K-7rV9o0d1Y
Edited by ZOS_Bill on November 17, 2020 9:51PM