How to prevent certain devices from being disconnected from the WLAN and then no longer finding the signal?

The following problem. We have a 500k line at Vodafone and the Home Box from Vodafone.

Our Playstation 4 is connected to the router via WLAN as standard. For some time now, the Playstation has lost the connection every 1-3 days and then no longer finds the WLAN signal. Only after a manual router restart is the Playstation able to recognize the network again.

We have exactly the same problem with our Amazon Fire Stick…

All other devices (cell phones, laptops and my PC connected via LAN) do not have this problem?!

Is there a connection between the WLAN module built into the FireStick and that of the Playstation 4? Do I have to change anything in the router config? In the WLAN config?

It is very annoying to restart the router every day during the day. So my question - does anyone know the problem and maybe has a solution?

That sounds more like a problem from the router.
I know of similar problems from this "Horizon" box from Unity Media.

Thanks for the quick reply. Yes, I thought so too, but I find no connection between the PS4 and the Fire Stick.

And the strange thing is that all other devices (samsung s4, samsung s10, iphone 6, my wife's laptop and my work laptop) are in the WLAN without any problems…

Could it be that the Vodafone Home Box only allows a certain number of devices into the WLAN and it is then no longer visible to other devices?

But is probably more often:
https://forum.vodafone.de/t5/St%C3%B6rungsmeldungen-Internet-TV/WLAN-wird-nicht-angzeigt-und-verbindet-sich-nicht/td-p/1756782

Man you are a fox thanks for the link!