Does my internet fall on the ps4 every hour?

When I play in the living room everything works normally. In my room (2 floors above + an internet amplifier in between) the internet goes down every hour. My brother on the same floor has the same problem so it has to be the amplifier, but this problem is not noticeable with the cell phone.

Internet provider vodafone

And the repeater from Fritz

So how can I solve the problem?

The internet is also always bad on the PS4 when playing Fortnite, even though the wlan box is 2 meters away from me and we have good Wi-Fi! 🤔

I always lay around * 😑

Maybe it's just the servers?

Repeater too weak i guess

Could be good idea! Could be because of the corona virus that everyone is at home.