While I’m glad that the OP got this issue squared away.We know now that this theory is incorrect. But I would have told you that a few days ago. Bad gas does not equal intermittent hard starting in hot conditions.
Bad gas can absolutely affect engine starting. If the gasoline has the wrong Reid Vapor Pressure (RVP) it can cause hard starts in a warmed up (hot) engine. In fact, if there is anything incorrect with the mix of hydrocarbons in the fuel it can affect engine starting.