Sharing my detailed workflow in case one can spot anything odd or a missing step. thanks
NEF imported in LR
Basic ACR adjustment in LR
In LR use Export to Tif to create a Tif copy
From within LR open tif in PS
Make few selections and save each selection.
Verify the selections in channels palette
Save file. "Master.tif"
(Here i have tested in two different ways. If I create / save channels on background layer,it does not stick. I have to create a copy of background layer then create channels and save file in order for channels to be saved and available)
Re open the "Master.tif".
Do a couple adjustment layers or in PS or via Nik Plug-in
(Merge down or flatten file so i only have one layer)
Verify channels are there.
Save file as "Master-Copy.tif"
Open "master-copy.tif"
Photoshop brings up image in ACR window. (Not sure why it is bringing up ACR at this stage)
I just select open image in ACR options
When file opens in PS, I don't see saved selections in channels.