I have multiple allergies and have always loved eating when my family takes me to WDW! Chef TJ is one of my favorites and saw him over at Trail's End/Hoop Dee Do as of late last summer. I know he's probably the most stalked chef at WDW, and because of that I know they've moved him around a few times and try to keep it quiet. I think he gets overwhelmed with some of the intense requests that guests with food allergies have had, and that some of the special things he's done for individual guests that get talked about on social media have become standard expectations for all guests with allergies that come to see him. He's a big sweetheart and I always love getting a chance to visit with him, so I hope that you get to meet him on your next trip.
I highly recommend you visiting Chef Ken at The Plaza in Magic Kingdom too! He's just as amazing as Chef TJ, and I really really hope that he's still at the Plaza come this summer because I am going back to eat there a few times on our trip! I forgot the name of our chef at Cape May Cafe breakfast, but when we went in January they were so friendly and did an awesome job of making sure I had a ton of options that were prepared with no chance of cross contamination.