ZSH does not handle multiple wilcards (*) correctly

Issue

Multiple wildcards * are not handled correctly by zsh. Command below is syntactically equivalent to time ksh -c "ls /tmp/*a*" although it takes a very long time to complete. bash does not show the same condition

$ time ksh -c "ls /tmp/***************************************************************a*******************************"
^C
real    44m9.896s
user    44m8.110s
sys 0m0.024s

$ time bash -c "ls /tmp/***************************************************************a*******************************"

real    0m0.005s
user    0m0.001s
sys 0m0.003s