No this is not common after transplant. I am a heart transplant recipient 7 1/2 years out. The first year is usually a lot adjusting to meds as your body accepts the anti rejection medications.
I would get in touch with her transplant team and have things checked out. She shouldn't be seeing a surgeon at this point she should be with a cardiologist and the post transplant team.
Great to see you're still doing your thing my friend. Been awhile since we last talked and I just wanted to say hi! I am 7 1/2 years post transplant and I am doing pretty darned good (except this age thing).
All my best to your and yours (Angie if I'm not mistaken).