NVS Writes Nullify Bond Data

Hi!
We are working on nrf52833 with NVS.
The devices are MITM (L3) - and therefore bonddata is saved, and an LTK used by the central for subsequent encryptions for connections.
Saves and reads to NVS work as expected, but it seems that any NVS write "messes up" (for lack of a better word) the peripheral's bond data, because subsequent connections (with the LTK) fail consistently.
NVS is mounted on the default storage_partition for flash0 in nrf52833, and we try to take up all of the space (6 sectors of 2048 default = 24 KB, which is the size of the partition).
Is this common? Can we perhaps configure bond data to be saved in a separate partition?
Thanks!
Roi

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