They are subprocesses created by Edge.
After closing VS they should all be terminated.
When you open a designer it will create the parallel renderers number (if you have it at 6 then it creates 6 subprocesses). When you close a designer the renderers are NOT disposed immediately, they are pooled and disposed a minute later unless reused by a new designer.
If you close all designers and keep visual studio open you should see the renderers get terminated after a minute or so. If they don’t there is a leak that we cannot reproduce.
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