Yes, the bulbs require Internet to operate. Wyze keeps schedules there, which command the bulbs.
Bulbs not being connected are a separate issue. That’s usually either a local environment issue, or a malfunction.
@TheNerdCorner, is that a list of ports for the bulb, or the camera? I think that list is for the camera:
@nerdland, I don’t believe the bulbs have a battery in them. If the bulbs stay connected for 5-10 minutes, it is likely because of a polling increment, not a battery. As a for example, the sense sensors will hold a state for 4 hours because of a polling increment.
As far as what network the phone is on, it doesn’t matter. My phone has NEVER been on the 2.4 GHz network while setting up ANY Wyze product. As a test, a few times I have actually set up devices from OUTSIDE my network using the cellular network system. Yes, the device you are setting up still has to be locally available to the network you are setting it up for, but as long as you type the correct SSID and password into the setup info on your phone, you are good. This is why they ‘require’ that – many people don’t change the pre-filled info, so the setup bombs if they are not on the same network.
Walking away from the router to set them up can work in instances where there is a bad band steering implementation on your router. When the router tries to force the device to connect at 5GHz instead of 2.4 GHz, then walking away instead of turning off the 5 GHz can take you out of range of the 5 GHz and leave the 2.4 GHz as the only option. However, I’d go with switching off the 5 GHz band for setup if you can, which is the typical way to deal with that issue.