A few days ago, my 396XT suddenly--and for no apparent reason--stopped tracking a local 700 MHz P25 trunked system with four sites. All four data channels disappeared. Meanwhile, all of my other scanners monitoring the same system (PSR500 and 996T) were tracking it fine. At the time, it was hooked up to the AC adapter. Finally, I disconnected and then reconnected the AC adapter and everything went back to normal. Has anyone else noticed this problem?