I also have the SOS followed by a 7x Red flash (Exit ?), on my Argon, connected to on Xenon via mesh, and to particle cloud over WiFi.
My applications (i have tried 2 different) boots, and runs for about a minute before SOS’ing and rebooting.
I have seen the issue on RC25 and now RC26. I few times on RC26 the SOS was followed by only 1xRED flash (Hard fault).
What does the 7xRED “exit” error code indicate ?
I have not yet tried running a non-mesh application.