I adjusted mine to "Off" and all GIFs, annimation, etc. is working fine!
First off.. if you clear the cache it will delete all of your texts... so make sure you save important ones... I learned this the hard way.
As for changing the animations displayed on the phone... why would turning them off on my display change how the GIF is sent via text message to another phone? The GIFs are still sped up on the other persons phone.
This doesn't work! Using an S7, never used to happen with my Note 3 or with my Moto G4. #samsung why has this issue not been resolved Or is it simply indifference on the part of Samsung??