Labour Remain top priority could be to blame Corbyn

Recent tweet made me think if we are still in the referendum phase, same political prerssures working on a direction.

Tweet from Labour Remain

I just wonder what priority they have. Was it always to "blame Corbyn" . Just waiting for a good time to launch a way to get a different leader. May explain some reluctance to work too closely with them. 

Not much about all this from proper journalists. There must be some info on what the Labour Remain supporters were up to and how this sort of tweet can continue.