Apparently it is a more simplified version of H.R. 5072 regarding the FHA premium increase. It seems that H.R. 5981 was created in order to move the FHA premium increase through the Senate a little faster.
"The reserves the FHA sets aside to cover losses on its insurance fund fell to $3.5 billion in June from $12 billion in March, as the FHA shifted its reserves around in anticipation of increasing claims, according to the new data."