I don't think at +13 you need to be concerned about a hypo, but I do think you may have pancreas action and maybe, just maybe, your kitty is going off insulin.
You changed his diet to Wellness canned from dry food a few days ago. Jinx needs extra hometesting and dose adjusting during this time, as the diet alone may be all Jinx needs.
A foster kitty (Bean) I took in a few weeks ago was a dry food eater, within a couple days of changing her to wet food she went off insulin completely.