Oholiab Junior had this happen a couple weeks ago. No damage except abilities registered. He was killed several times by supers but bullets had no effect on him.

Seems like I had a game where practically everyone was invisible, I joined in part way through.

I played a game today with an invisible Titan. Not lag-skipping or invulnerable, just... Not there.

The only reason I know he existed is a Fist of Havoc that killed 3 of my team.. But there was nobody in the middle of it. The death camera didn't even highlight and focus on him like it normally would. Later a grenade too appeared out of nowhere. Again, no sign of the Titan (nor any blips on the radar) and no death cam. Very bizzarre.

Has anyone else experienced similar?

I think this is just Bungie slowly bringing Titans into the invisibility/blink group. We have already seen Titans be in one place and appear in another, now they have added invisibility! Now I Just need to figure out how to turn it off and on...