Oh, I don't even remember enabling this option, but these windows are gone. Kudos to Apple engineer. I had to uncheck (in Safari): Safari > Develop > [your machine] > Automatically Show Web Inspector for JSContexts Safari > Develop > [your machine] > Automatically Pause Connecting to JSContexts

Can someone tell me if this is a bug or expected behavior? Same behavior here. I don't know if it's a bug or not, but you should report it to Apple if you feel it's a bug. Maybe it's a way how to inform you about installed updates. Dunno.

You can't, but some do fill them in the Open Radar too. Google it, can't include a link.

Reported as FB7619830 in case anyone reads it.

I just came across this thread and here's an update ...My problemI'm using Airfoil to transmit music playback from the Music to the Sonos One speaker and I'm experiencing lot of sound drops (playback interruptions). This problem occurs only and only when my MacBook Pro is connected via WiFi. There's no issue if I turn WiFi off and use an USB dongle with ethernet cable.I can easily reproduce this problem by holding down the Option key and start rapidly clicking on the WiFi menu bar icon. The problem appears almost immediately and while I'm rapidly clicking on the icon there's basically no music playback.Network trafficAirfoil sends +- 4MB of data per minute, roughly 125 UDP (IPv4) packets/second. When this problem occurs, packet rate drops down to +- 60 packets/second, immediately goes up to 600 packets/second and then back to normal 125 UDP packets/second.Other notesWhen I open the Wireless Diagnostics, I see that my Tx rate is about 600Mbps & MCS Index is 7. But when I'm rapidly clicking on the WiFi menu icon, MCS Index circulates 7 -> 9 -> 7 -> 9 -> ... and the Tx rate goes up to 800Mbps and then back to 600Mbps. Not sure if it's related to this issues, but these (Tx rate & MCS Index) changes appear at the same time when the sound drops out.Comparison to the Music.appThe official Music isn't affected. One can quit the Airfoil and transmit music via Airplay in the Music directly (there's a button on the right side of the volume slider). No matter what I do, there's no sound drop at all. The difference here is that the Music:utilizes AirPlayXPCHelper,amount of data sent per minute is +- 2MB (half of the Airfoil traffic),more importantly, Instruments & Wireshark tells me that the music is sent via TCP (IPv6) and there's also lot of PTPv2 traffic.Other network trafficThere's no other network traffic. While this is happening, no uploads, no downloads, just the music transmission.WorkaroundI don't have a solution for this problem, but when I disabled Location Services completely (System Preferences - Security & Privacy - Location Services and uncheck the Enable Location Services) & rebooted, the problem disappeared completely. I can rapidly click on the WiFi menu icon, no sound drops at all. Thanks for the tip in this thread!HW & OSmacOS Catalina (10.15.3 -19D76)MacBook Pro (15-inch, 2016 - MacBookPro13,3)tp-link Archer VR300 v1 VDSL modem (1.0.0 0.8.0 v009c.0 Build 181214 Rel.51117n)This was reported on Mar 1, 2018. Writing this down on Mar 6, 2020 and the issue is still there. 2 years, pretty sad for such a crucial component like networking.What's next?I'll test it for the whole day with disabled Location Services (so far good) and then I'll start enabling apps/system services one by one to see if there's a difference and to find which one is causing this issue. Then I'll gather wireless diagnostics, system logs & Airfoil logs and will report it to the Apple & Rogue Amoeba (Airfoil).I'm in touch with Rogue Amoeba support, but at this stage, I can't really say if there's anything they can do in the Airfoil to prevent this or not. I still don't know what's causing this. Disabled Location services is a hint, but it's still too broad.In the meanwhile, no location services, no Find My MBP, ...