Prolights Smartbathex Flickering with Wolfmix

[NCAudioLuci]

Good morning,
when I connect the Prolights Smartbathex fixtures to the Wolfmix in master/slave mode — with one Smartbathex set as the master and the others as slaves — I experience an unusual issue: for example, when setting a fixed color, all the units flicker irregularly, as if the signal is dropping. This happens on both the master and the slave units. Has anyone else encountered this problem?

The connection cables work, and the setup is very simple. I go from the Wolfmix output into the input of a SmartBath configured as DT1 (Master Transmitter), while all the other SmartBath units are set to DR1 (Receivers).
I’ve already tried changing the cables, the connected SmartBath, and the output from the Wolfmix.