The exported spine json file can not be used properly.

[SbIm]

The exported spine json file will ignore the key at frame 0 if there is no animation for the bone.
But the spine runtime will not use a default 0 value for animations.
So problems may happend when animations transition happens,

I made a script to fix this issue:: db_spine_fix

Hope this can be solved in the next dragonbones version.