Hey friend
This is looking a lot like heat stress...the canoe leaves are a pretty good indicator of that. Usually I haven't gotten this heat stress until my plants are in the 90s, but every strain is different in what it can handle heat wise. You could try laying stones in the pot and it can help to evaporate water slowly to cool things down, or set the pot in a container of stones and water to help keep the roots cooler. I don't want to suggest putting it in the shade because it needs the light...but if all else fails and it continues then maybe during 2 of the hottest hours move it to the shade.
You can also feed a silica supplement and kelp extract and they're good for helping keep the stress down and tolerance of stresses.