I would definitely treat it, the best hope to save this implant. If you can easily remove the crown that facilitates the ease in performing LAPIP, however I have treated similar and not removed the crown. I like to decrease watts to 3.6 and be mindful of the LAPIP protocol and occlusion! There appears to be cement on the mesial at the collar, which would be good to remove. Worse case the implant fails, best case you are a hero. Good luck!