Drain life and shadow bolt issue

[Redcore]

When i channel drain life and during channeling i cast shadow bolt, casting bar stops working and i get no visual information about my spell cast - casting bar is empty, but character animation is ok...
Has Anyone experienced it?

[Emander]

Same issue with arcane missiles and then breaking it to start casting other mage spells

[TheLockKing]

...why are you not using a stopcast macro for Shadowbolt?
Better yet, why are you using default castbars?!

[Redcore]

Well i dont use stop cast macro. Thats is right but even if you dont use it cast bar should work without issues. When i played official wow it always worked there. So i assume its a bug. And i use xperl addon. Dont know if it has something to do with it. Will try it when i get back home from work