@JackDaniell felt something funny while streaming his stamplar and suggested he might be dodge rolling his heal. I performed this test, and sure enough, if you dodge roll as the enemy is released from the cc, you dodge your own heal 100% of the time. I made this video to get the bug visibility and posted it in this forum to inform the PvP community.
Sap Essence heal used to be dodged like this, but it was fixed in either Thieves Guild or Orsinium patch.
I do not know and did not test if passive dodge from Major Evasion can dodge this heal.
https://www.youtube.com/watch?v=SErPhEQPWp8