WiFI disconnection and connection error

[Kicha]

Model: ZE620KL
RAM: 8G
Firmware/APP Version: WW_user_90.10.138.175_20190117
Frequency of Occurrence: Everytime
Rooted: No
APP Name:

After updating to Android 9, problems started connecting to Wifi. When the connection is active, the network is arbitrarily disconnected and when the connection is repeated, an error occurs, the network disappears, reappears, the connection is on and disappears again and so several times. I also found a slower speed of the Internet connection via WIFI several times.

[ServiceE_Asus]

Hi bambolbi222 , Sorry for my late reply. I would suggest you update the system to the WW-90.10.138.181 for a check. (settings> system> system update) Thank you.