losing lens profile with tetherd shooting

Tetherd shoting in Lightroom Classic.

Nikon Z7 mark 2 on MacbookAir- M1.

When using in develop settings: "Same as previous" the lens profile doesn't show up any more after a few shots, (4 or 5) It says: "Unable to load lens profile" After changing Setup from "Custom" to "Auto" its is back again and works fine for 4 or 5 shots. When I use a "User preset" the problem dosn't occure.