Ones I have like 17 or so armor mods equipped, they glitch and can't get armor charges from orbs. Sometimes I can't even pickup orbs at all (orbs would just stay in the ground). in the video I can pickup the orb and it gives indicator I picked up an orb but no armor charges is given, I have tested to see if its a visual bug only using yellow mods, but its not.
In some mods combination, the armor mods stay active for ever and never expire. its very glitchy when the number of mods gets close to 20. that's my theory. some mods are more glitchy then others from my experience.