Dot strokes being created at the start and end of strokes

[StainyGrimes]

Sometimes when I draw a new stroke I get a full-pressure dot-stroke (despite very lightly pressing the trigger) at the start and/or end of the stroke. Sometimes there's one dot, sometimes more.
I am using a Vive.

[StainyGrimes]

Seems to only happen when I'm barely pressing the trigger. Maybe the smallest possible value sent from the trigger causes this?