Xcode 26 crash upon dealloc of `WKNavigationResponse` on Main Thread

Since Xcode 26 our tests are crashing due to the Main Thread not being able to deallocate WKNavigationResponse.

Following an example:

import Foundation
import WebKit

final class WKNavigationResponeMock: WKNavigationResponse {
    private let urlResponse: URLResponse

    override var response: URLResponse { urlResponse }

    init(urlResponse: URLResponse) {
        self.urlResponse = urlResponse

        super.init()
    }

    convenience init(httpUrlResponse: HTTPURLResponse) {
        self.init(urlResponse: httpUrlResponse)
    }

    convenience init?(url: URL, statusCode: Int) {
        guard let httpURLResponse = HTTPURLResponse(url: url, statusCode: statusCode, httpVersion: nil, headerFields: nil) else {
            return nil
        }

        self.init(httpUrlResponse: httpURLResponse)
    }
}

import WebKit
import XCTest

final class ExampleTests: XCTestCase {

@MainActor func testAllocAndDeallocWKNavigationResponse() {
  let expectedURL = URL(string: "https://galaxus.ch/")!
  let expectedStatusCode = 404
  let instance = WKNavigationResponeMock()
// here it should dealloc/deinit `instance` automatically
}

Here the call stack:

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   CoreFoundation                	       0x101f3dd54 CFRetain.cold.1 + 16
1   CoreFoundation                	       0x101e14860 CFRetain + 104
2   WebKit                        	       0x10864dd24 -[WKNavigationResponse dealloc] + 52