Yes, I have been getting low frame rates on those planes, but I have been able to get in. The controls have been locking up for the Beluga at times for me, mainly the engine. Also, especially when walking around, the Beluga plane is laggy, though not sure if we are discussing the exact same issue. Not sure if you have also noticed on XCloud that the trim makes the back of the plane (Beluga) glitch slightly?
Yes, hopefully they fix this in the patch tomorrow, and then this forum can have a new analysis on whether it is fixed or not. Not sure how, but this would have to be escalated to a more severe issue if not.