Stereo 3D changes active resolution of projectors in 3x2 Mosaic

Hardware:
2x Quadro RTX 8000 in SLI ( Nvlink Bridge )
6x 15m Displayport to Displayport active cable (3 per Card)
6x 1920x1080 120Hz Projectors

Steps made in Nvidia control panel:
Nvidia Quadro Driver 461.40 ( fresh install )
reboot
EDID File exported from projector and bound to outputs
reboot
Activate 3x2 Mosaic with 6x 1920x1080 bei 119,88Hz
reboot
Activate Quadro Stereo 3D (Quadbuffer)

Until this point everything behaves as expected. But after a final reboot, the System Topology shows a active resolution of 1920x1200 at 59,95Hz per Projector (projectors native Resolution). Although the 5670x 2160 120Hz Mosaic is still active. Therefore 3D does not work.
On a single Projector, without Mosaic, Stereo 3D 120Hz works fine.

See attached, picture of system topology before and after activating Stereo 3D.
Please let me know if you need further information.

A solution or even a pointer regarding this problem would be greatly appreciated!

Second picture of System Topology. After activating Stereo 3D

Jakob - sent you a direct message re: this issue.

thanks