Yep. But your overwatering begins with a small pot, is exacerbated by hot weather......so you keep watering to battle this.
Also, you're feeding, and you're testing your water Ph.......but are you testing your wet soil? As the plant flowers, auto or otherwise, it will (try to) get bigger, will require more water, more nutrients, and all of this is like trying to feed a baby like an adult, in this case the pot and soil being the baby. Even if you micromanage it, every day, twice a day, and keep everything balanced like a tightrope.......rootbound is going to be the next roadblock.
You don't have to grow an auto, or use a small pot to not grow a beast of a plant
You can start a plant later in the season, you can force flower early, you can top and prune it down.....and you can choose a variety that's naturally on the smaller and early side.
Your indoor plant looks good. Your outdoor plant may currently be bounced back, depending on time of day, weather, your watering/the soil. But now it's showing leaves curling upward a bit. This may not be so bad, or it could be the next sign of the same problems.