Shadow form bug

Hello.
When i enter shadow form, i become black colored, after i mount, i become brighter like ghost. And i will be brighter untill i reenter shadow form, to become black again.
When i say brighter i mean visualy it looks like i target my self, but it doesnt matter do you target your self or not, it will be bright untill you reenter shadow form.
Is there any way to fix it? Any addon or something else?
When i enter shadow form, i become black colored, after i mount, i become brighter like ghost. And i will be brighter untill i reenter shadow form, to become black again.
When i say brighter i mean visualy it looks like i target my self, but it doesnt matter do you target your self or not, it will be bright untill you reenter shadow form.
Is there any way to fix it? Any addon or something else?