The OP was not able to reproduce the problem as can be taken from an edit to his question:
Changed absolutely nothing, tried again and problem solved!
To honor the Q/A approach used on SE sites, this comment has been converted to a community answer, that once voted for will not make this question pop up once in a while.
To me this looks like your nozzle is too hot. Try turning the temp down by 5 degrees at a time and see if the issue goes away.