https://devzone.nordicsemi.com/f/nordic-q-a/26291/bootloader-hangs-until-i-connect-with-j-link-rtt-viewerI set the NRF_LOG_BACKEND_RTT_ENABLED 1 and NRF_LOG_ENABLED 1 in the bootloader and application. After a reset, the application gets stuck in the bootloader Or maybe (bl starts the app and reboots immediatly back to the bootloader in a loop). Whenen-USTelligent Community 13Sat, 04 Nov 2017 00:50:24 GMThttps://devzone.nordicsemi.com/thread/103489?ContentTypeID=1Sat, 04 Nov 2017 00:50:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9a11449b-9f5a-44f9-bf44-07d425cc5d62bjorn-spockeli<p>Hi Alex, it could be that you&#39;re filling up a buffer which causes the execution to halt until its empty if Logging is enabled and you do not have a J-Link debugger connected.</p><div style="clear:both;"></div>