Strikes Under Socialism?

Would workers be allowed to strike under socialism?

Who are they striking against? Themselves?

yes, but in socialism there would be no reason to, since they own the means of production; witholding their labor is no longer a meaningful tactic.

Assuming it's the MLs that seize power, they'd be striking against those who (indirectly) own the means of production, the nomenklatural

This, in true socialism we wouldn't need bosses where we're going.

It depends what you mean by socialism. If you mean a "socialist" state then yes workers should go on strike in Cuba, China or Vietnam or in state that is transitioning to socialism.

State socialism? yes they definitely could, and it would have to be discouraged. Individual workplaces don't control the product of their labor, the greater democratic society controls it. They would have to vote if they wanted to change distribution (The more egalitarian the distribution the easier planning would be, ideally most essential goods would be distributed evenly to all citizens)
co-op/market socialism? No, they own the co-op, no reason to strike against themselves.

but, I doubt workers would strike under socialism because there's no capitalist class continually trying to compete and lower workers wages/workers would be paid much more than bare subsistence

What if part of the workforce of a co-op is upset about perceived unequal treatments or breaches of contract?

Then they're wrong and should be beaten the fuck down.