Sometimes not working button for mapping match in right container. Unfortunately i not see any rule when…
See gif in link below…If i select other object and run “match mapping” then button works well and i can go backt to “first object” and everithng is ok.
Thanks for reporting this @Chita
Logged as RH-62856 Match Mapping button on Texture Mapping panel is broken
I suppose you already know that you can start the command by typing _MatchMapping until the bug is fixed