Amazon are the pits when it comes to WiFi support, they seem to have an American mentality about it, only channels 1-11 on 2.4 and next to nothing on 5ghz.
Unfortunately a lot of vendors seemed to do that (eg TP-Link, who do not have region-specific firmware) especially older hardware, which killed the EU channel usage pattern. You HAVE to use 1,6,11 or trample all over the spectrum, as channel 13 was not supported. While that may have been fixed over time, the damage was already done as all networks in range have to follow the same scheme.
What made this worse is bad implementations of auto channel selection which doesn't seem to consider channel widths at all, so would pick really idiotic channels, overlapping multiple other networks.
As for Amazon products, if I restart the firewall on pfSense, my Echo Show seems to take minutes to recover, if I reboot the Access Point I usually have to force it to reconnect manually. Its very bad at reconnecting to the Internet if there is any interruption.