Whenever I run shopify app serve and open the ngrok URL in the browser, it correctly loads inside admin.shopify.com but then immediately opens the old my-store.myshopify.com URL in a new tab.
The app then loads correctly in both tabs.
A screen recording can be found here: https://www.veed.io/view/e0283bc6-a3b5-4afb-8044-1839e43e1e9b
This behavior is super annoying and I am getting nowhere with debugging.
Does anyone have an idea how I would go about debugging this? I am pretty sure that none of my own code opens a new tab and suspect it is AppBridge or another Shopify library.