Welcome to the forum @guitarandbone.
I have actually experienced this as well when using my cordless weed trimmer and edger. Thanks for posting and validating what I have noticed as well.
Mostly when I am edging and the line hits a harder spot in the ground or the edge of the driveway or sidewalk. Its like a loud static skip.
I thought it odd the first couple of times I noticed it, but noticed the consistency this week and was about to post the experience in my first impression thread.
Could be worth raising to support.