Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 391.35
Broken: version: 2.80 (sub 57), branch: master, commit date: 2019-04-16 20:13, hash: rB5d8030b8f3cf
Worked: any version before 2019-03-27
Short description of error
[fbx export of animated and rigged character is broken. hand/arms go nuts. i can change versions just to fix the issue. any earlier version than march 27 still works.]
Exact steps for others to reproduce the error
[i reproduced it with my armature in any case. it only doesnt appear if i export without any animation data or keyframes. if i add a single keyframe and export the character again it gets broken.
I also tried to reimport the broken file to see the results and it seems still broken. however i could see that the armature wasnt broken but the skinning somehow instead(see added picture)]
reimported broken fbx file in blender:
heres a blend file where that happens. also keep an eye on the foot Constraints, they are broken too but i might report another bug later as a new issue.