Fix F3 participation erroring out on sentinel errors #156

Job	Run time
ci-lint	17s
build-calibnet	4m 24s
build-debug	4m 28s
build-2k	4m 13s
build-forest	4m 18s
build-mainnet	4m 19s
gen-check	5m 48s
gofmt	17s
lint	3m 11s
mod-tidy-check	33s
setup-params	4s
test (test-itest-curio, ./itests/curio_test.go)	4m 45s
test (test-all, `go list ./... \| grep -v curio/itests`)	3m 2s
test (test-itest-harmonyDB, ./itests/harmonydb_test.go)	2m 31s
test (test-itest-alertnow, ./itests/alertnow_test.go)	1m 40s
	43m 50s

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