iOS 26 icons started to appear in iOS 18
Some apps like Slack, Grok, Instagram etc. applied new horrible looking iOS 26 icons to my iOS 18. It's clearly not ok - I didn't upgrade the system and still getting icons replaced with certain app updates. Is there a way to force iOS 18 to use icons designed for it instead of icons for the next system version? It's looking inconsistent therefore ugly.
iPhone 15 Pro