In case it helps, I noticed that in Ubuntu 21.04, my ~/.config/GIMP/2.10/pluginrc contained
(menu-path "<Image>/File/Create/Acquire/XSane/Device dialog...")
within the (proc-def "xsane" ...) s-expression. No menu-path appears in my Ubuntu 21.10 ~/.config/GIMP/2.10/pluginrc.
In case it helps, I noticed that in Ubuntu 21.04, my ~/.config/ GIMP/2. 10/pluginrc contained
(menu-path "<Image> /File/Create/ Acquire/ XSane/Device dialog...")
within the (proc-def "xsane" ...) s-expression. No menu-path appears in my Ubuntu 21.10 ~/.config/ GIMP/2. 10/pluginrc.