Wonder if this issue has re-arisen on MX105 and latest FW. Currently it's on MX 18.107.2. Getting similar reports from customer that box frequently makes a loud wailing noise, so loud that even with door to room shut, they can still here.
Checked connectivity logs, and can see that there are a lot of drops visible. Have logged a support case, but haven't heard back yet.
The other thing I've noticed is:
Wondering if anyone else is seeing this.