"They shouldn't be doing that if the refund is issued within 45 days of April 15."

Did you read anything at the links I provided? This is what started in the prior filing season.

"The IRS is required by law to pay interest on tax refunds due to individual taxpayers affected by the federally declared disaster who filed their Federal tax returns for 2019 on or before the postponed due date of July 15, 2020. The overpayment interest will generally accrue from the original April 15 due date, rather than the postponed due date of July 15.

Normally, the IRS is required to pay interest on a refund if the refund is issued after a statutory 45-day period. This rule does not apply to individual taxpayers who qualify for relief due to a federally declared disaster."