Under normal load conditions, even just the weight of the machine on the shock should not permit the spacer to move. On my 2015 the ID is 1.800", so not a great deal smaller than yours, and they fit nice and snug around the shock.
I wouldn't worry about it myself to be honest. What is the OD of your spacer? Mine is almost 2.5 (2.45).
I wouldn't worry about it myself to be honest. What is the OD of your spacer? Mine is almost 2.5 (2.45).