When you delete a connected bank account from your QuickBooks Self-Employed banking page, it permanently deletes the account and the related transactions. Let's perform some troubleshooting steps to ensure that this not browser-related.
Logout from your QuickBooks Self-Employed account. This will ensure that your account information will be refreshed.
You may also access your QuickBooks Online account using an incognito or private browser:
Mozilla Firefox: press CTRL + Shift + P
Internet Explorer: Press CTRL + Shift + P
Safari: press Command + Shift + N
Google Chrome, press CTRL + Shift + P
If you’re able to log in and removed the account successfully, you may want to clear the cache of your regular web browsers. The stored data in your browser’s history can cause some odd errors and may affect QuickBooks’ performance.
Lastly, you can run the Browser Health Checkup Tool to check any issues with your browser’s health and its compatibility with QuickBooks Online.