CAT output query

using Flex6500, windows W10 PC, Maestro, SmartSDR 3.8.19

I seem to be having some problems with the CAT output working with both Logger 32 and N1MM. Although the CAT port (com4) indicates it is connected to the app the frequency information may start ok but upon changing band does not move and when changing back to the original band is then not tracking. The strange thing is that this only seems to be on Slice A. From my tests frequency tracking via the CAT seems to work on slice B.

I have only noticed this since the latest smartSDR 3.8.19 but cannot be sure.

Is anyone else experiencing this or have any suggestions?

mal G3PDH