We are experiencing issues with Advida A-200 PTZ cameras with autofocus while on a preset patrol.  The autofocus fails and the preset stops become fuzzy.

We have installed hundreds of these cameras and are now seeing a chronic issue with autofocus.  The units in question have worked well for over 2 years.   

The Advida warranty is 3 years but we are getting pushback for an RMA.  Just wondering if anyone else is having problems with cameras or Advidia RMA process.  We have a ticket that has been open since early December with no satisfaction.