Opps, sorry it looks like I forgot to toggle the "denoise" this render element".
It is working fine.
but the new bug I found was related to the new DR.
on some nodes it keeps trying to start 3dsmax but a maxscript window with title "post.ms" appears for 2 or 3 seconds then
max closes and tries to start again, infinite loop !
I triple checked that all nodes are identical in configuration and etc ...
any more information I can provide ?