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Smooth Vertex Weights operator affects ALL objects that are in weight paint mode(even deselected ones)
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Description

Blender Version
Broken: 2.80, 02581a7ef819, 2019-02-08

Short description of error
If you leave object A in weight paint mode by making object B the active object, then you enter weight paint mode on object B and use Smooth Vertex Groups operator, the operator will also affect object A.

Exact steps for others to reproduce the error
In attached blend:

  • execute the Smooth Vertex Weights operator
  • increase number of iterations to better see the issue
  • notice how the deselected objects' weights are getting smoothed. (Those objects are in weight paint mode)

Other weight operators may be affected. I tried the Clean Vertex Groups operator, it didn't seem to be affected.