Snail block not on the chain

[ycjmail]

testing 0.9.7 version, get "Snail block not on the chain" error below
INFO [01-31|12:57:06.325] Received complete proposal block height=12665 hash=973662…ac125e
INFO [01-31|12:57:06.326] enterPrevote(12665/32). Current: 12665/32/RoundStepPropose
INFO [01-31|12:57:06.327] Finalize: header.SnailHash=17e0a3…5a721b header.SnailNumber=199
INFO [01-31|12:57:06.328] Finalize: verifyFastBlock Height:=12665
ERROR[01-31|12:57:06.329] verifyFastBlock process error height:=12665 err="Snail block not on the chain"
WARN [01-31|12:57:06.330] vote AgreeAgainst number=12665 hash=973662…ac125e

[hyangl]

The same issue #36 , the scenario will not occur at production environment, snail block is mined too slow that every snail block difficulty is the same as minimum difficulty, so can not to switch to the correct branch.

[ycjmail]

thanks for your reply.
if I use 1 miner node ,the error donot appear ;
if I use 2 miner node ,the error appear in less than 2000 fastblocknode .