Hi Tanya , I am sorry about the Dend. trouble . Know how it is , what I think happned is .
The larger pot and more mix , plus the rain . I know when I repot there are always some damaged roots . You can take a q tip soak it in peroxcide and apply to the cuts . be sure to keep the cuts dry , might move it indoors if it is the rainy season there . Less light than usual . Hope this helps a little . Gin