Fee issues when buying US stocks with NISA at Rakuten Securities

I heard that when using NISA to buy US stocks on Rakuten Securities, both buying and selling are zero commission. Although the commission part is temporarily frozen during the transaction, it is later refunded. The changes shown in the graph also reflect this.

10/12 00:37

10/12 13:15

However, my current issue is that the refunded commission doesn't seem to take effect. First, the available USD in my account hasn't increased, and there's no change in the 受渡代金 either.

Does anyone know why this is happening? I would really appreciate any help.