We had a like issue on both sides of our Wildcat 353LS. Wildcat picked up our Wildcat took it back to Elkhart replaced both side and delivered it back to our driveway.
Oh, it was out of the warranty time frame when they did this for us.
As a side note, start making a list of every little problem or repair that needs to be addressed. Attach this list to the front of your frige and the warranty folks will take care of it for you while it is there.
They are amazing at customer support.
2018 Berkshire XL 40B
Past RVs: National Pacifica 40', Kenworth T300 Toterhome, Jayco Class C 32'. American Eagle 40',
American Eagle 40', Bounder 38' tag axle