when i look into the history of wallet "A" there is the incoming transaction from the tumbler with 0 confirm, when i search the trans.ID for it it says the fee is:15,323SATS • $6.56 - Wich should not count as low??
Paste the transaction ID into a reputable blockchain explorer, for example mempool.space, and check the "Fee rate" value. It should be in sat/vB.