[GAMEPLAY] Luden's Echo still hits Tahm's Devoured teammates

Recently I have noticed that Luden's Echo damage proc is applying to my teammates after I devour them as Tahm Kench. I understand burn damages will still apply to them but they SHOULD be untargettable which means that Luden's should not be hitting them. I feel like this is a bug and as someone who plays a lot of Tahm Kench it does distress me as I found this out when my teammates were dying inside of me from no other possible cause.