ok I'll dive deeper in to this....
but to my knowledge:
LR uses adobeRGB(1998) for all display
--except in the Develop where it uses ProPhoto RGB....
there is no way to override the colorspace for the working space
(unless I'm really missing something here)
this is why LR does not "sync" color spaces with photoshop and the rest of the CC suite (via bridge)
and the only way to set the "output profile" is by exporting as an image (tiff, jpeg,etc.)
or setting the profile in the "edit in external app"
or using LR to do the color management and setting the "profile:" in the Print workspace (nee tab)
I'm guessing that your workflow was printing some already colorspace tagged images?
and LR was kind enough to pass the images unmolested..
(which is cool - but still needs a tagged tiff)
or am I just getting this all wrong
and you are some how printing Proofs?
I'm ultimately looking for a workflow that goes from RAW to Print
and I'll make intermediary tiffs if need be
but I'm not a fan of the PrintTool and would like to find other ways to feed the QTR
Lightroom is one possibility
another is Affinity Photo (very good worth a look - very responsive devs )
(or I await a new driver)
I have to run some tests - I'll be back
thanks for the hints!
really helps to understand this and the help is invaluable