In theory, it should ask you that only if you choose "save as...", so make sure you select "save" (Ctrl/Cmd + S). Also, Lightroom should stay open while you edit in Ps, otherwise it won't be imported again.
Hope that helps,
Michael Niessen - Photographer, photo-editor, educator
In PS, I cannot do a "SAVE"... it always sends me to "SAVE AS"...
The result is that the edited file, which is saved as a PSD, is not automatically imported in LrC...
I noticed that when I'm working my raw files in LrC, and I select to "Edit in PS", it opens the raw file in PS instead of making a copy and making it a PSD.... Note that my raw files are stored on a Synology NAS.
When I store the raw files locally on my MAC, everything works as expected...Any suggestion from your side would be appreciated !!!Jean-Marie