Horses have to get used to working on a synthetic surface
Not all surface are the same. Some can be quite firm, some can be soft and also very deep. These considerations need to be made as the ground reaction force which can be applied to the hoof / limb may vary greatly, small modifications can be made to help limb alignment and equalise such forces. Surface properties can affect both performance and the risk of injury. One dilemma is that properties that aid “better performance” also increase the load on the horse’s musculoskeletal system and can increase the risk of injury.
One example is a surface which is too firm, making it easier for the rider to ride fast.This in itself would increases the load on the horse’s limbs. Observations have been made that horses that aren't used to working on a synthetic surface may trip in the beginning until they get used to it.
A wider webbed shoe will help the horse stay on top of the surface. A rolled toe such as the EQ can help break over on horses new to the surface. The surface should be well maintained to prevent it becoming too firm and uneven.