Command pastebin because this forum keeps forcing spacing weirdly:
https://pastebin.com/sehdHRjs

notice blaze is shaking inside of the spawner. Suggested fix only update the animation of the blaze if it's age increments not half start and then go back once it realizes it's not older? That's my best guess

this is a dupe of  MC-111339 because it falls under the category of mob spawners rendering stuttering mobs. the animation something I thought was the title so I reported this separately as it wasn't an entity animation sorry