Mango Flush Leaf Curl?

[FloTheSto]

Hello all, went out of town for a couple days to return and see my younger ValPride throw out a few new flushes that seem to be a little curled and browning on the edges and some on the leaves. Underside of leaves don’t look to be damaged by thripes and no other pests seem to be present either. Thoughts aside from that? My initial thoughts are fert burn, or micronutrient deficiency? I’m newer to growing from young trees and would like some guidance, thanks! 





Here’s the flush that has grown out a bit following the damage

[FloTheSto]

Image of full tree was before it flushed out**

[Oolie]

Looks like fertilizer burn.