I can see a few things in your chameleon husbandry that could be improved.
Feeders - If I were you I would work silkworms and/or hornworms in to your rotation as well. Maybe some crickets and/or cockroaches too?
Gutloading - I can't see any info on what you are gutloading your feeders with. If you are unfamiliar with the term or don't know exactly what to do I would start by checking out (the very wonderful) sandrachameleon's blog:
link. She has a recipe for a dry gutload which can be used as a substrate for your superworms and mealworms.
Supplementation - standard supplementation schedule for a veiled chameleon is:
Plain calcium (phosphorus free & NO vitamin D3) with every feeder
Calcium with D3 once every two weeks
Multivitamin once every two weeks
Another method is to use something like Repashy Calcium plus. This is designed to use with every feeder. I'd recommend you do research in supplementation and find out what will work best for your cham and you.
The method you are using at the moment is giving your chameleon too little calcium. If continued this will result in hypocalcemia which is something you will definately want to avoid!!!
Lighting - You're using good bulbs

. However most people on this forum will recommend a 12 hours on 12 hours off schedule. Nice easy one to fix
Temperature - As elizadolots has suggested, your temps are just a bit higher than what is recommended by this forum. Basking spot should be about 82-86 for a male veiled of 4 months.
My guess is that your current problem is due to the lack of proper supplementation. Hopefully you've caught it early enough. Has your chameleon slept during the day since you got him or is it a recent development?