Its been like this since U5 guys & Turbine have done nothing about it or tried as far as I noticed from patch notes. Once you claer this region your be ok till you get to Isengard then you might crash there also.
Im not shure if its the same bug as you get loading Pit of iron, Fangorn & Orthanc.
TRy muting sound in your options before you travel there, It works for the instances for some of us but I have never been back to ravenwood sicne using this workaround. You can unmute the sund after porting tho gravenwood can have crashing wile just walking aorund.
Other Chars, Elinros Mini , Finfelen LM, Aldenath Capt, Daganlas Hunter & some crafting alts