I went through my router logs. The only odd thing I've found is this:
<table style="width:100%">
<tr>
<th>Threat Management Alert 1: A Network Trojan was Detected. Signature ET MALWARE Win32/Zonebac Traffic Redirect. </th>
<th>From: X.X.X.X:57153, </th>
<th>to: 173.239.8.164:80, </th>
<th>protocol: TCP </th>
<th>9:21 am 09/11/2020</th>
</tr>
<tr>
<th>Threat Management Alert 1: A Network Trojan was Detected. Signature ET MALWARE Win32/Zonebac Traffic Redirect. </th>
<th>From: X.X.X.X:54879, </th>
<th>to: 173.239.8.164:80, </th>
<th>protocol: TCP </th>
<th>8:34 am 09/11/2020 </th>
</tr>
<tr>
<th>Threat Management Alert 1: A Network Trojan was Detected. Signature ET MALWARE Win32/Zonebac Traffic Redirect. </th>
<th>From: X.X.X.X:50000, </th>
<th>to: 213.247.47.190:80, </th>
<th>protocol: TCP </th>
<th>2:43 pm 09/05/2020 </th>
</tr>
<tr>
<th>Threat Management Alert 1: A Network Trojan was Detected. Signature ET MALWARE Win32/Zonebac Traffic Redirect. </th>
<th>From: X.X.X.X:57829, </th>
<th>to: 173.239.8.164:80, </th>
<th>protocol: TCP </th>
<th>8:14 pm 09/03/2020</th>
</tr>
</table>
Are the "to" IPs associated with any user logins?
Those "threats" are the main reasons for formatting my machine ... It's also weird but the above logs are from around the time from when disconnects of the WHOLE network started.
Additionally, maybe this will be useful, but the disconnects, to date, have only happened in a "game lobby" (before a game starts but not in main chat lobby) or in a "hosted/started game."