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.