OSX PPTP VPN password problem with firmware 9313 and 9135

Hello,

I didn't know where to post if router issue or firmware issue.

I installed a new RT-AC66U and first tried firmware 9313 then downgraded to 9135.
I configured several PPTP VPN users with mixed MAC and PC users.
If the password started with number and then a letter example " 123Pass " then the MAC users 9 out of ten times could not connect.
If the password started with a letter example " pass123 " or " Pass123 " then MAC users can always connect.
This happened no matter what OSX...

OSX PPTP VPN password problem with firmware 9313 and 9135