This continually happens on my phone as well and it's very frustrating. I don't understand why the GIF will play normally in the GIPHY app and then when I actually send via text it is sped up to the point where you can't tell what's going on half of the time.
@userPMuSyJKcwD Hey, have you tried clearing the cache and force stop on the messages app? if not below is some troubleshooting steps you can try:
I lied. It only worked once. Then it went back to fast speed. So I rebooted and it worked once. Future reboots were unsuccessful. Very frustration to me and my recipients.
It seems to work sending to other Samsung phones on my plan but not to Apple devices.
I have have this bug for multiple Samsung devices. S2X, S5 Active, and now both of my S8+ devices both do this.
Does Samsung not test their own stuff?