Blender grease pencil joins random end of point.
I open grease pencil draw 2 strokes. If I attempt to join 2 ends of the stroke, the end of the stroke opposite to the points I've selected are the ones that join up. the Flip stroke direction option described in the blender documentation appears to be absent from this version of blender
System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.67
Blender Version
Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: rB0f45cab862b8
Worked: (newest version of Blender that worked as expected)
Short description of error
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Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]
