Instagram being blamed for iPhone 15 overheating issues
Hot takes on social media about Apple's iPhone 15 overheating problem are starting to point fingers at Instagram for causing the issue.

The launch of the iPhone 15 range has been marred by claims the smartphone is overheating when under load, such as at times it is recharging or being used for intensive gaming. However, it seems that using it for Instagram, a more pedestrian usage of the devices, could also trigger overheating bouts.
As part of his review for the iPhone 15 Pro, Marques Brownless aka MKBHD took time to discuss battery usage and overheating, confirming that he did encounter the latter, "but not what I would expect."
Recounting using the iPhone during hot weather to record footage at a golf event, MKBHD says the iPhone worked fine. However when flying back, with Spotify running as well as flicking through Instagram, the YouTube personality encountered a five-minute period when the iPhone got hot and went through approximately 5% of battery.
"There almost seems to be no rhyme or reason why it does this randomly once in a while," Brownlee offers, alongside a screenshot of the Battery section in Settings. The image shows Instagram as the top battery user at the time the screenshot was taken, with Spotify in second with 15% usage.
Brownlee goes on to propose that bug fixes and app updates could fix the issues in the short term.
Tech reviewer Faruk of iPhonedo also found a similar situation with Instagram on the iPhone 15 Pro Max. He tested the theory by monitoring an iPhone 14 Pro, iPhone 14 Pro Max, and iPad Pro that had all been updated to iOS 17 and iPadOS 17, and ran Instagram on them all.
In testing, with Instagram running and "almost doing nothing" with the app, it was found to drain the battery by about 10% over the course of ten minutes.
While the iPhoneDo tests seem to have uncovered a smoking gun, namely Instagram on iOS 17, it isn't a problem affecting all users. The YouTuber admits the issue affects a "small group of people," rather than it being a more generalized problem.
Instagram and parent company Meta have yet to address the new claims.
Read on AppleInsider

Comments
Apple does note code their app for them. If there was an issue, Meta should have found it in the months iOS 17 was in Beta
It's absolutely possible that Insta was accessing system libraries or APIs in a way that didn't conform with proper or documented usage specifications, but worked just fine until Apple changed something. This might not even be on purpose; might just be a bug that didn't show any consequences before (though Insta has always eaten battery like crazy on my phones).
We saw that many years ago when Apple switched their laptops' Firewire hardware to a newer version of the Agere chipset, and a bunch of audio interfaces broke. People immediately pointed at Apple and screamed bloody murder.
…except that a bunch of interfaces, whose programmers had properly followed spec in their drivers, worked just fine. The others got driver updates eventually and started working with the new 'Books.
TL;DR: we don't know whom to blame, at this point.
Take Instagram off your iPhone. TWO problems solved:
In testing, with Instagram running and "almost doing nothing" with the app, it was found to drain the battery by about 10% over the course of ten minutes.<
Apple designs and builds the SoC, the thermal system, the outer casing, the operating system, the APIs, and is the gatekeeper for every application that runs on an iPhone – and yet the company still blames third party developers?
How is it even possible that any of these applications can cause unexpected overheating in the first place, and how, if the App Store review process is put in place to protect users, did nobody at Apple catch this during the review process?
I had this issue and when I disconnected the Exchange account my battery was fine.