So the problem could be either on the Toyota side, or the iPhone.
I've never had this issue in 18,000 miles and have the same software (and probably the same hardware) as your truck. I've got an iPhone 15 with IOS 26. Is your phone old? Is the IOS up to date?
For most of my adult life, I worked with a crew of 12. We were issued a new truck about every four years –lots of off-road driving–and run them 150,000 or more miles. Fords and GMs. Clutches lasted between 80,000 and 110,000, depending on the driver.
I've had all four generations of Tacomas. All were autos. That's hundreds of thousands of miles. Zero issues.
Manuals? Clutches wear out, $1,500-$2,000 if I'm not mistaken.
So it depends on two things: how many amps your lights draw, and the wire gauge (size) of the ground wire in the pigtail. To be on the safe side, run one to a bolt or some other ground.
I installed the Rough Country electric steps. I can't say toooo much about 'em. They're great.
https://www.amazon.com/dp/B0DH6SM9TJ?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1
Well, the problem disappeared.
Toyota doesn't sit on its butts after a new release.* If they see a failure trending, they fix it. It would be stupid to keep manufacturing things that break during warranty. Expensive and a death to their reputation.
Several people reported this failure on the...
I think Taco Rancher is spot on.
The problem with the term , off-road, is, what does that mean? No pavement? County roads? Maintained USFS roads? Or two-track roads?