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nrf52840 dongle alway boot in dfu

Tried to flash ncp .hex for pca10059 on a brand new dongle and now it is stuck in dfu (pulsing red led). The process worked on a second dongle without any issues.

Something is wrong with the dongle?

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  • # nRFConnect System Report - 2019-09-13T14-35-45.037Z

    - System: Apple Inc. MacBookPro14,3
    - BIOS: Apple Inc.
    - CPU: 1 x Intel® CoreTm i7-7820HQ 2.90 GHz 8 cores (4 physical)
    - Memory: 3.5 GB free of 16 GB total
    - Filesystem: /dev/disk1s1 (HFS) 465.6 GB 91.3% used

    - OS: Mac OS X (10.14.6) darwin x64

    - Versions
    - kernel: 18.7.0
    - git: 2.20.1
    - node: 12.0.0
    - python: 2.7.10
    - python3:

    - Connected devices:
    - /dev/tty.usbmodemF16F8E7748791: F16F8E774879

    - Current device:
    - family: nRF52
    - type: nRF52840
    - romBaseAddr: 0x00
    - romSize: 1024 KiB
    - ramSize: 256 KiB
    - pageSize: 4 KiB
    - blAddrOffset: 0x14
    - blockSize: 512
    - ficrBaseAddr: 0x10000000
    - ficrSize: 1024
    - uicrBaseAddr: 0x10001000
    - uicrSize: 1024
    - mbrBaseAddr: 0x00
    - mbrParamsOffset: 24
    - mbrSize: 4096

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