CAT command for one slice changes frequency on this slice and another (4.1.5)

I am using SmartSDR 4.1.5 on Windows 11 with my Flex 6600M in SmartControl Mode.

I usually have 3 panadapters running:

Panadapter 1 with 6m and Slice A for CW/SSB

Panadapter 2 with 6m and Slice B for FT8

Panadapter 3 with 2m and Slice C and D for FT8 and MSK

I sometimes close Slice A on Pan1 and add it to Pan3 if there is good Tropo or similar to be able to run traditional modes while still monitoring the digital frequencies and move it back afterwards.

My JTDX instances for FT8 are set to "Fake It" for split which means that it sends a CAT command to change frequency depending on my TX Audio frequency. CAT is using separate TCP Ports (except Sice D which is using a virtual COM port for MSHV).

This has always worked fine. Now recently I again moved Slice A from 6m to 2m as above. But now when I transmit on Slice C it also changes the frequency of Slice A to the same (so say 144.1725 on TX and then to 144.174 on RX).

I've tried restarting the Radio and SmartSDR several times, also restored a known profile but the link is still there. Sometimes it is Slice B that causes another slide to QSY. I haven't found a consistent rule. I also can't see any setting that would cause this (DIV is off!).

Has anybody seen this before?

73 Carsten G0SYP