Christoph i can tell you that should not be the case, SCT INST as it is known has an upper limit of €15000. So any transfer below fifteen thousand euros should always be instant, my guess here is that it’s an automated process of fraud check that prevented those repeated payments from being instant the first time. My guess is those transfers will arrive at bunq, but may take a day. If you regularly transfer funds from a
deutsche Bank to bunq, they will eventually be instant again, as this might just have been a safeguard by them, which is normal and happen randomly across banks.