MKR WiFi 1010 stuck at boot with red LED on

See photo: I am seeing this occasionally with the MKR 1010. At boot, the orange (CHRG) LED keeps flashing and the big red LED is on. The board stays stuck in this state until I power it off and on again, at which point it boots normally (very occasionally it will do this twice in a row). This happens about 1 out of 20 times I power it up. I hope it's just a bad board, which is fine since I'm just using it to test designs. I just don't want this to happen in a completed design.
Thanks!