Springer spaniel – clumsy – hesitant to jump

My 9 mth old springer spaniel is often clumsy. He struggles with stairs, at times falls with legs splayed like a newly born calf and he doesn’t have the confidence to jump on the bed or lounge although he is quite able. More often than not he stands there and waits for us to help him up. We have had him vet checked and all is good with his hips etc. I’m wondering if it is common with the breed.