I had the same issues! I checked amp today and it says will be deposited June 3. (I have Wells Fargo but it doesn't show pending deposit like other banks the Friday before so until it's in there...) anyway I had Ammended my 2019 tax return and finally got that check today. So there may be something with some of us who have been waiting and the 2019 pending taxes.. Realistically it was probably a 2nd glitch and the IRS has finally looked into it thanks to all the articles and attention gotten from the forgotten 15thers. So thank you all for making it noticed! I also put my bank info on wmp April 15th.
