AC 25 6000 USA. Not sure what triggers the problem, but
- with a layout window active, decided to to over all layouts moving everything to the Archicad layer,
- open Find&Select, change the previous settings (walls, of a given construction, with given height, on such story) to “all types”, “not on” the Archicad layer,
- go sheet by sheet, moving (Edit Selection Set, Cmd-Opt-t) everything to the AC layer
- after a few sheets I do a Send & Receive, and the F&S settings revert to the previous ones.