I have seen something like this some years ago (can't remember which version) where the stretch layers seemed to be locked.
Can't remember a particular solution and haven't noticed it lately as I have had to set up new profiles.
Another problem I have is the stretch lines are on but they use a line type that is almost invisible.
I have a "dotted wide" line that just has one small dot every 300mm so it hardly shows (especially with a thin pen).
For some reason my profiles always default to this line rather than the solid line (probably to do with my template and changing line types from the standard template years ago).
Anyway long story short - if you move your cursor around in the profile editor where the stretch lines should be (usually the extents of the profile) you may see the cursor change to the mercedes icon meaning the line is there.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11