Strange WiFi issue with Hub 3, multiple devices sometimes "connected without internet" - Hub fault?
Have been having this issue for a month or so now, nothing has changed in terms of what devices are being used or software changes etc on them, and have had the same Hub 3 for years and a VM Booster Pod for quite a while now too (which is needed as had real problems with signal in places previously) and no issues with them, only issues have been if the actual VM connection has been down or had problems. The connection from the Hub to VM is fine though as a computer that is connected by cable to it isn't having issues. The Hub has a solid red power light but I understand that is just that the white LED wears out rather than it being faulty, it has been red for a long time ie before this issue.
But now several devices that usually connect fine will sometimes do the whole "connected without internet" thing ie they will connect to the WiFi (signal strength is fine since getting the Pod, and can even be right next the router, it definitely isn't a signal strength issue) and then say they are connected but no internet etc - have had it on a couple of Android phones which usually seem to be need to be left for some time before they will connected (toggling off WiFi or rebooting them doesn't seem to help) and on an Apple laptop which usually seems to get it after waking from sleep and it will connect if left for a while or if rebooted.
The really odd thing is that it doesn't affect all devices simultaneously, eg can have two phones side-by-side, one will be connected fine but the other will have this issue for some time, then the other one might have the issue another time etc.
I've tried the pinhole reset on the Hub 3 so all settings are default (WPA2-PSK as recommended on other threads is set/seems to be the default), tried changing the smart channel optimisation to off as that seems to be recommended by some here, but did the reset again to put it back to defaults when I found that isn't compatible with the Booster Pod. The Apple laptop is an old one so hasn't had any software updates for a few years, so nothing has changed there - as it's affecting multiple devices which seemed to start around the same time, I can't think it can be anything other than a Hub issue, but it doesn't feel quite like a Hub fault with the way it seems completely random what device will be affected and when, with a Hub fault I'd expect more consistency ie no devices working. Have tried clearing and re-entering the saved WiFi network on the devices.
So I'm looking to find out please whether this is a Hub fault and if so if we can arrange to get it swapped (presumably would also need the Booster Pod swapped as understand they are keyed to the Hub?), or if anything else to try, but can't think of anything other than the above? Not looking to change to a third-party one as is more cost and complexity, and have had the Hub 3 for years without this issue so shouldn't need to.
