I have 2 Bolts on wifi with hidden SSID. One is on Hydra 21.8.2.RC1 and the other non-Hydra 20.7.4. The Hydra keeps dropping from Devices and can't be seen or orange exclamation point from the other tivo. The non-Hydra does not have this problem. However kmttg, Tivo Desktop, iPad and Android apps will always connect and stream from either Bolt all the time. It doesn't matter whether the IP address is DHCP or fixed. If I save the same static IP address, it generally will come up and then within 15 minutes drop. I can repeat this, but I need to turn on the TV to do so. I tried the connection to the Comcast x1 router and TP-Link re350k range extender - both come up and drop. It occurred also on 21.8.1, but don't remember if it did so on 21.7.2. Any ideas?