I updated all my iOS devices with 11.4, but have since discovered that there's an issue with wifi. The devices still work well with Apple's own Airport Express & Extreme routers, but when I try to connect to any other wireless access points (such as those from Ubiquiti), it always disconnects after about 2-3 min. It'd then not be able to find the wifi network for about the same amount of time, before eventually reconnecting after 2-3min. I have an iPhone X, iPhone 8, and two iPad Pro 2 (12.9in). Does anyone else notice this issue? Is there a solution?