Does it make any sense that many Sanders supporters are saying they will vote for Gary Johnson?

I’m listening to the latest Five Thirty Eight podcast where one of the people on the panel is mentioning statistics where Sanders supporters are planning on voting for Johnson, not Stein. I don’t remember the numbers, but I’m taking the guy at face value

This makes no sense to me. Johnson is a libertarian, and opposed, economically at least, to everything that Sanders supports.