When a only-socialist government is formed and then the elections to the Soviet are lost, no event to overthrow the government appears.
1. Even if the Bolsheviks + anarchists are in the majority, you can still create a government with them (and get all the seats in it, as well as in the Soviet, if you are an internationalist)
2. Even when the Bolsheviks take power in this way, they issue decrees, they do not interfere with the constituent assembly and/or the overthrow of the government (because now they are the government, lol)