I am not sure if you should be concerned. I would suggest contacting the IRS concerning that particular change in status. Super User, @mesquitebean, offers suggestions on getting in contact with an IRS agent.
Don't worry...the IRS started processing the millions of early filed returns today and as your return goes thru processing it may not show up on the IRS site at times...be patient and look again tomorrow.
This is worrying me I got accepted on jan22-2020 an couple days later it said on wmr no matches found!! What is going on already
With the influx of returns just give it a a few more days to update. Help with staying up to date with your return has been posted below. https://ttlc.intuit.com/community/refund-status/help/why-is-there-no-record-of-my-return-at-where-s-my-refund-wmr/00/26435
yesterday in afternoon it changed back received. aka accepted.
but then Im wondering why it hasnt even processed yet. seeing according to turbo tax irs accepted it on the 13th. with estimated refund on feb 3rd.
I understand irs started on the 27th........
wishful thinking......