First of all, Hello and welcome to the forum.
If you are noticing browning and the canes are getting soft or limp, then you might want to take a look at the roots. If the roots are brown and soft then they are rotting from overwatering and will need to be trimmed off. If they are green and firm then they are ok.
Keep in mind that if they are in bark then even healthy roots can look brown due to the coloration of the bark. Check the firmness of the roots to be sure. Let us know what you find so someone can advise further.
Thanks for the pictures, I like the flower.