Will not start after driving in temps above 65deg

Here’s my issue, when driving in 65+deg, no problems BUT, if I park for more than 15min, go to start, it only cranks strong but will not start. If I let it sit for 10-12min , it’ll start up????
if it’s below 65deg it will do this only after multiple stop/park situations. After 10-12min it will start.
Anyone have this happen to them or know of a solution?
TIA..