Thank you so much for your answer
Same tip as the previous comment make sure you keep your seat consistent and half halts and also to add make sure your leg pressure is consistent also as less leg will slow down and more leg will speed up etc xx
Ok thank you for answering
Try to keep your posting the same speed. I ride a younger horse that does that but instead of pulling on the reins, half halt and keep your posting the speed you want it. It’s really tough to do but your horse will want to go in rhythm.