There is a lot of work involved to restate earnings. The structure of some of their wholly owned holding companies will change, and everything will need to be checked and double checked among accountants and lawyers. Further, bucause many BDC investors look at NII as a metric to dividend coverage, they will want to define and report adjusted NII. (Personally, I'd rather see taxable income.) A restatement many not happen for 2-4 months.
However, right now I'd say that the Russell rebalancing is having a far more significant affect on the share price. Index funds holding this must sell it between now and June 15. If a few funds are holding shares, should they hope that the pps rises and sell later, or sell little by little until June 15? Every BDC is seeing some selling pressure. JMO