Cruise Control Speed

[janmeeks]

Drove a 2002 LS430 for 15 years and recently bought a 2020 LS 500.  I use the cruise control a lot and am frustrated that it will not "hold" the speed at the same speed I set.  For example, if manual cruise (not radar) is set at 80, the actual speed is only 79.  Very seldom will it hold the cruise speed.  I've taken it in for service and am being told that is "normal".  Does anyone else find this to be true..........it was never so with the old version and my husband drives new model GMC's which do not do this either.  Will appreciate feedback so I can either get over being annoyed OR get the problem resolved!

Thanks!