I am having an issue where I switch into a morph and some of them cause me to move really fast in the opposite direction. I don't know if this could be conflict or not. I see that as not possible as I only have this and Tropicraft installed. And the basic JEI and TMI

are you sure it is from tropicraft?

@Hunter52901 it is most likely

1.12 users should now be able to fix this issue by updating to latest Tropicraft version and disabling swim animation in the config.

Similar issue was already reported some time ago. #106

It seems like the issue coming from Tropicraft, and it's not possible to fix without killing the hitbox feature, so it's not fixable.