When running in the Endless Archive as a werewolf, engaging in the goat minigame seems to cause you to lose all movement speed buffs while transformed. This does not seem to be the case with movement speed out of form, but dropping form and going back into it will cause your movement speed to drop again. The only fix I have found is to leave the instance and port back in.
Leader of Lycan Syndicate, PC NA's tri-faction werewolf guild.~~~Played since the beta, got the monkey.~~~"The blood of the pack is now yours. They are your only family, your only allegiance!"