Q: Car seems like it is slower to start when engine is warm

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I recently noticed that when I am out during the day and I am running errands, or driving my car for a while, and then getting back in soon after, the vehicle sounds like it is having trouble starting and is a bit slower to start. If I start the vehicle after it has been sitting for awhile it starts up with no problem and I only notice the vehicle sounds a bit labored when the engine is warm. I just recently got my starter replaced to see if that might be the cause and to fix another issue, but unfortunately it is still sounding slow to start. It still always starts on the first try, but just sounds a bit labored when the engine is warm. Could it be my battery?

My car has 90300 miles.
My car has an automatic transmission.

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