Grey Arrow on Minimap Not Showing

Isssue from Druda: The grey arrow on my minimap is not working on this alt only, I have two others and they have no problem with that. On this character the yellow arrow for the quests, the point of interests and the party members arrows are working just fine but the grey one for the chests and rares is not. I can see chests and rares only if I am close to them and they are inside the range of the minimap. That is especially frustrating when doing the new assaults.
All my characters are using the same addons. Don’t know what other info to give. Thank you.

Same thing exactly happens to me. Any advise on what is causing it?

NOTE: If i pick a dps alt, or a tank, its ok. When i pop a healer is when all of the above occur…if it helps.