New Redmi Note 5 Wifi Bug

[claudio genova]

(randomly) despite Wifi On and connected I dont have any more access to the web.
The only way to solve through the following steps
1- Disable WI FI
2- Let the web connect through mobile data
3- Re-enable WIFI
4- It will NOT connect automatically to my WLAN (which shows to be saved anyway)
5- Tapping on my WLAN, will reconnect and restore to nornal connection

Somebody suggested is a known problem using 2 speed WLAN (2.4 & 5 G)

MIUI Version
V9.5.6.0.OEIMIFA

ROM version
Global Stable ROM