The IRS did the best they could in a very short time using antiquated equipment with limited staffing during a pandemic situation ... I would cut them a break if there were a few unintended glitches.
To handle the stimulus checks the IRS had to divert personnel from income taxes which has put them way way behind in processing them and now those resources had to be redirected again so the stimulus handling has been put on the back burner.
They have not had a major system update in 7 years which in computer time is ancient and the IRS budget has been cut every year for more than a decade so complain to your congresspersons and insist they fund the IRS properly so they can do their jobs.
