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DFU OTA old firmware

Hello!

I've got a problem when performing a DFU OTA. I first flash my software(#1) with bootloader in de nrf53840DK. When i make changes to the software i use app_update.bin to update the software(#2) over BT. This works well. When i reset the board it will load the new software. Than again, i made changes to the software(#3) and upload it again over bt it first will boot the new software(#3).

But when i reset the board it will automatically start with the second software(#2) not the third sotware(#3) revision. It only does this when i upload new software a second time.

Like it doesn't overwrite the second software(#2) with the new software(#3). Is it a software memory problem?

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