Bonjour discovery with NetServiceBrowser not working in iOS and iPadOS 14

My app has to find a certain bonjour service on the local network and my code works fine for iOS 12/13 as well as macOS Big Sur and Catalina.

The exact same code fails on iOS and iPadOS 14 with this error:
["NSNetServicesErrorDomain": 10, "NSNetServicesErrorCode": -72000]

Which I have looked into and -72000 is an "Unknown error".

I am using NetServiceBrowser to find the service and here is my code:

Code Block 
class Bonjour: NSObject {
    var discovered: [DiscoveredInstance] = []
    let bonjourBrowser = NetServiceBrowser()
    var discoveredService: NetService?
    override init() {
        super.init()
        bonjourBrowser.delegate = self
        startDiscovery()
    }
    func startDiscovery() {
        self.bonjourBrowser.searchForServices(ofType: "_some-service._tcp.", inDomain: "local")
    }
}
extension Bonjour: NetServiceBrowserDelegate, NetServiceDelegate {
    func netServiceBrowser(_ browser: NetServiceBrowser, didFind service: NetService, moreComing: Bool) {
        discoveredService = service
        discoveredService?.delegate = self
        discoveredService?.resolve(withTimeout: 3)
    }
    func netServiceBrowser(_ browser: NetServiceBrowser, didNotSearch errorDict: [String : NSNumber]) {
        print(errorDict)
    }
    func netServiceBrowser(_ browser: NetServiceBrowser, didRemove service: NetService, moreComing: Bool) {
        self.discovered.removeAll { $0.name == service.name }
    }
    func netServiceDidResolveAddress(_ sender: NetService) {
        if let data = sender.txtRecordData() {
            let dict = NetService.dictionary(fromTXTRecord: data)
            /// do stuff with txtRecord dict here and then add to discovered array.
            discoveredService = nil
        }
    }
}

I have no idea what could be causing the error and have tried enabling networking permissions and capabilities but have not been able to stop the error from occurring.

Thanks.

Code Block xml
<key>NSLocalNetworkUsageDescription</key>
<string>Looking for local tcp Bonjour service</string>
<key>NSBonjourServices</key>
<array>
	<string>_some-service._tcp</string>
</array>