My extension was successful, but the tax payment did not leave my bank account yet?

I filed for an extension and was accepted. I also remember the form asking for my bank account and routing information, as well as the amount of tax I wanted to pay and on what date.

I set an amount to pay, gave the correct bank and routing information, and set the date for 04/15/2019. The payment has not left my bank account yet.

I called support and she kept saying "give it a moment" and I could tell she had no idea what was going on. She did confirm others were apparently complaining about the same issue.

Is this a systemic issue where payments are delayed? Did I somehow make a mistake on my bank / routing number? Even though I'm fairly certain I couldn't have since I copied them from the source...

I'm about to make the payment manually to the IRS but don't want to overlap with TurboTax...