IdeaPad A1000-F wifi hangs after a few minutes

Hello,
Just got a A1000-F tablet and i encounter a strange problem with wifi connection:
Setting up and connecting to my home router (wpa protected) : ok, connection works.
Then, after a few minutes of usage, all network traffic stops ( no internet connection in apps, browser, play store, messenger and sync stops...). However wifi icon remains on and seems connected with full signal power.
Notice that router is connected to internet (other wifi devices are connecting fine)
I have to cycle wifi off and then on to make it work again, and it hangs systematically again after a few minutes.
Tried deleting and recreating wifi connection: no effect.
Same behavior when tried on another wifi network.
Tablet has been updated to last firmware (larger partition).
Please help.
Kind regards

Do a factory Reset. Go here:-
Settings > Backup & Reset > Factory Data Reset.
You can say thank you by pressing the star left to my post IF I HELPED YOU

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