Hi fellow Avocado tree enthusiasts!

I'm a little worried since I think my tree is getting burnt, or maybe something like fungus is going on since I planted a 5g tree in sunny LA. I applied this IV organics 3-1 product to help with that, but it seems like it's getting burnt and splits down the middle of leaves/holes, etc. Full photo shows what it looked like when I planted it last week. I did notice above the grafted area it looked like a notch into the branch that I thought had healed up. Any ideas here before it's too late?