@DRSie 

Disconnect the wireless network, and reconnect, will it help?  Or turn off the wifi button on your phone, and turn it on.

  @DRSie it's not a good practice to put everything on same VLAN, especially VLAN 1. Because VLAN 1 is the default VLAN. If you just simple put everything on VLAN 1, the performance can be getting worse. For example, you adding more devices to it, or even worse, some devices are sending abnormal multicast/broadcast traffic, like Apple Bonjour or some IoT devices send a lot mDNS multicast packet that can congest the whole network, occupying your AP's air interface, or even cause AP high CPU utilization.

You can try to separate your network by creating a different VLAN. Here is a good example on how to do it.

there is some good guide on internet

https://www.youtube.com/watch?v=dLwyBzJKL1s

  @Vincent-TP I did all that. Nothing has worked.

  @TOHanks That is why I made vlans. I have two computers and two phones on vlan1. I have another vlan for smart devices. One for cameras and one for echos.