No, I'm sorry I can't help from here. Perhaps with a picture, but even then no guarantees.Under the soil seems to be a few little white mite type things that are pritty darn fast because as soon as you go near them they run off quick. They seem to go mostly on the pot itself than on the soil but there is some that are scuttling around on the soil. Do you have any idea of what these little critters may well be? they are about 1 or 2 mm long and white a bit like the tiny bugs you get in garden soil?
It is not uncommon for me to find insects in my pots, I try not to over-react. Usually they seem to pose no threat. Keep a close eye on your tree and continue to try to identify the critters.