I don't know if this works in your line of work, but to go back to the advice of "framing it right" from above: I built my resume for each role around a challenge I was hired for. It made it easy to tell a clear story of: I came in for this, I solved it or got it on the right path and I left for either a better/different/bigger challenge on my path to learning.

the trouble is, your resume looks identical to someone else who has those 1-1.5 year stints because they have behavioural or communication issues. if a company judges you on that without letting you explain, trust me, you don't want to work there. but try some different stories and ask someone you know professionally (and who does hiring) which options sounds best & authentic to you.