I've had this Azalea for about 5 years now. It's always been healthy and blooms very nice every spring. I've been noticing though these past 2-3 weeks that there is about 2 branches on the lower right where the leaves turned brownish and dropped. The branches themselves are still very much alive (flexable and bright green when scratched) but I'm not sure why it's doing this? I'm trying to remember when it had its last repot and I'm thinking that was probably close to 3 years ago. Could it be a root issue and maybe needs to be repotted?