I work a ton of hours so it'll be tomorrow before I have time to actually look at anything, but I did a screen recording with the mx+ and this is the highest spike I saw. The first two days it did it, it was towards the end of my 20 minute drive to work. Yesterday it didn't do it at all, and today it did it within the first 2 miles and then behaved the rest of the way. Yesterday I didn't turn the cruise control on at all. Today, it did it while it was on but not engaged, and then I had it set to 65 the rest of the trip without issue.
Also, so far this is only happening on my way to work in the morning. On the drive home there are no issues. There's traffic in the evenings so the 20 minute drive turns into 40 minutes or more. But the winter weather is mild here so far in Houston so the temp only swings about 15⁰.
I may pop the alternator off tomorrow morning and take it to get tested. I've been meaning to replace the belt anyway. I'll look for and check all the grounds I can find as well as some connections mentioned in other threads and general condition of wires and cables. The place I bought the battery from had some fancyass machine to test my old battery before I replaced it, so I'll go back there and have them test this new one too.
Again, thanks for the help.