Sprinkler Head Cover If An Irrigation Head Is Unable To Pop Up Due To A Heavy Weight On It Will It Damage The System?

If an irrigation head is unable to pop up due to a heavy weight on it will it damage the system? - sprinkler head cover

I have found in a backyard pool of small (15 feet) and only realized he was referring to one of my sprinklers. I hope that takes the weight of the water column pop constantly, but to no pressure leak in the system?