System Information
Operating system: Mint 19
Graphics card: Nvidia 860M

Blender Version
Broken: 2.80 build of feb 21rst
Worked: Blender 2.79

Short description of error
Make parent --> Bone : Weird behaviour

Exact steps for others to reproduce the error

• Keep default cube
• Add an armature
• Select Cube, then Armature, change to pose mode, and select your bone
• Make Bone parent (Ctrl + P --> Bone)
• Cube moved where it shouldn't
• Weird : In "Make parent" panel (where you can change parameters of just exec operator), checks "keep transform" --> Cube back to original location, but when you uncheck, keeps the default location

More weird things:

• On a new file, after making bone parent (where cube moved):
• Clear parent (Alt+P)
• Make Bone parent again (the cube don't move)