This is from Apple and what is causing this issue. Use private Wi-Fi addresses in iOS 14, iPadOS 14, and watchOS 7 To further protect your privacy, your iPhone, iPad, iPod touch, or Apple Watch can use a different MAC address with each Wi-Fi network. To communicate with a Wi-Fi network, a device must identify itself to the network using a unique network address called a media access control (MAC) address. If the device always uses the same Wi-Fi MAC address across all networks, network operators and other network observers can more easily relate that address to the device's network activity and location over time. This allows a kind of user tracking or profiling, and it applies to all devices on all Wi-Fi networks. To reduce this privacy risk, iOS 14, iPadOS 14, and watchOS 7 use a different MAC address for each Wi-Fi network. This unique, static MAC address is your device's private Wi-Fi address for that network only.
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