Why in “:normal”command ^[ seems doesn't work with A? (vim) -

today, learnt bit of vim normal command, , below experiment:

:normal insert ^[ yyp :normal append ^[ yyp   # result of execute first command several times  insert insert     insert insert insert      insert insert insert insert       insert insert insert insert insert       insert insert insert insert insert      # result of execute second command several times  append  append  append  append  append  append  

why second command ignored yyp part? how fix it?

just remove space between ^[ , yyp