Otg function not work after new update on Asus zenfon 2 Laset

[AC Question]

Hello,Recently i have got new system update from Asus via (OTA)wifi,Now the problem is OTG option is not work totally.But Before update the micro usb flash drive (Transcend jetflash)works nicely. when i insert the flash drive it's response nothing.The flash drive is new.Do you have any solution. please help.Thanks.