@ravipati450 holy smokes dude! It matters on the weight you put on each WAN. rank the ISP you want to run in highest to lowest. You can do a 1 for everything and the devices will randomly go through...

@Tristy86 Make sure your UDM Pro and the Network Controller are completely updated. to the newest firmware. Like Clive said, enable mDNS. If it's multicasting, you will need to enable multicast...

@slipmat Do you have fast roaming enabled? If not, try it. If so, disable it and retest. May seem like its trying to connect to the furthest AP. If fast roaming doesnt work... You want want to set...

@MrHC1983 I seemed like they had the same issue with the Linux Imaging Server. It requires a next server protocol. There was a beta firmware relased, but IDK if it was for the 707. Search for it and...

@Shawn_Rodrigues Give us more details on the low speeds? What speeds are you supposed to be getting on the each WAN?

@slipmat I would download and install acrylic wireless analyzer on your laptop. Then walk around. anything below -73 on the 2.4 is the start of low signal. Also look at the signal levels between APs....