We've been having difficulties connecting to our Roamio Pro (TE3) and XL4 with most ios devices. After login I can select the DVR but then the device won't connect, and we get a sign-in error ("network error") from the TiVo ios app." The strange part is that a newer iPad Pro an Android S10 and an iPhone 6 work just fine and we can sign-in online with the same credentials. All DVRs are wired. Devices that are having difficulty: iPad Air iPad Air 2 iPhone 7 Things we have tried: rebooted DVRs factory reset ios devices installed the latest ios version installed the latest TiVo app version I would rather not change my TiVo password because I'm afraid that my other working devices would stop working. Any ideas what might be causing this?