Not had any major problems with station drop out on ours, as of yet.
But last week we made a trip in the S5 that we had done many times before in the ZS EV.
The route is through some very hilly areas, and it briefly lost the signal for a few seconds.
I don’t remember it doing the same thing on the same route in the ZS EV.
But the ZS EV does have an external arial vs the arial that is build into the HRW elements of the S5.
This has to be less effective than the external mast of the ZS EV surely ?.