Collected hawthorns are extremely touchy if one disturbs the roots. After collecting often 80 % to even 100 % die. An established tree like this can also die when you repot it. It can also stop growing for a full season, without leaves and then come back the next year. Or not! Anyway, this is what I can see doing next spring.
Walter Pall's main blog about bonsai and his work with trees from day to day. Lots of good pictures of good trees and lots of valuable information about bonsai.