Testing out some USB ASIC miners which were not being used, I figured why not try solo mining Sprouts

Seems like when submitblock is sent to RPC, wallet closes , no error in debug.log

I've tried new wallet.dat file and imported old transactions from old wallet using private keys, still same.

I've solo mined many coins in the past... and I am able to solo mine other low-diff coins without any issue.  Why not Spouts?  What is the trick?  Is it segmentation fault inside SignBlock?  ATOMMINER had same issue in discord approx 1 year back, but no answer was given.... the daemon is crashing when I submit block via RPC

using cgminer 4.11