Try adding --edge-skip-compat-layer-relaunch flag

Author: lenacohen

tests/selenium/pbtest.py

@@ -189,6 +189,7 @@ def chrome_manager(self):
     def edge_manager(self):
         opts = EdgeOptions()
         opts.add_argument("--load-extension=" + self.extension_path)
+        opts.add_argument("--edge-skip-compat-layer-relaunch") # https://github.com/SeleniumHQ/selenium/issues/15340#issuecomment-2689372248
         opts.binary_location = self.browser_path
 
         for i in range(5):