Related to #1610, which doesn't completed catch all the cases. With version 7.10.0 when the callback calls a function which references this.state. ``` myFunc = () => { this.setState({ ...prop, }, () => this.doStuff()); } doStuff= () => { console.log(this.state.asdf); } ``` Can work around this by just passing this.state into doStuff: `this.doStuff(this.state)`