completation auto ignores the hint of "display all posibilities(y/n)"

[stupied-ies]

when double type in TAB, it will auto display all the supported commands. If there are a lot of command, it shuold hint "Display all ??? posibilities(y/n)" and let me make choice. It display this hint, however, it ignores the hint and display all the commands

Display all 303 possibilities? (y or n)
::oo                             eliminate_common_subexpressions  load_simstate_behavior           set_ignore_translate_off
::pkg                            encoding                         load_upf                         set_isolation 
...