Honored Contributor
Honored ContributorOne possible explanation is that in your application code you are over running the end of buff1_app, or have some other kind of memory over write. If this was the case then the changes in memory organisation could cause the otherwise apparently harmless over write to cause a problem.
However that doesn't tie with it working on JTAG download, but not when booting from flash. If it only fails on boot from flash, then that would suggest the problem is related to how the bootloader loads the code. Could this be a cache coherency problem? Do you have any cache in your system? If so, try disabling the caches and see if that changes the behaviour.
