2.4ghz devices disconnecting from wifi

Since yesterday, around 6h30pm ET, my 2.4ghz devices started to lose connectivity to my wifi network. They just lose wifi connectivity. All devices at the same time. Rebooting won’t fix anything. I noticed that when I click on “optimize wifi” in the app, everything goes back to normal and the devices are able to reconnect.

The issue appears to be specific to 2.4ghz.

Anyone else experiencing this?