Any suggestions why the Fritzbox 7390 Wireless speeds can be so up & down.
When running 'up' WIFI connection speeds are over 100Mbps.
Here is a screenshot of what I mean by 'down', 1 Mbps - which means SMART TV/File streaming wont work.

Important to note that this is WIFI only & not internet speed, even hosted files will buffer when usually they would play fine.
I am moving all to wired after cable run etc.
*edited to remove personal names from screenshot