These days I've seen the worst bug from iOS on Apple's mobile phones.

The video below explains in just 4 minutes how the bug is.
https://www.youtube.com/watch?v=HUE9mCN7sek

It's a Hindi character that if you get it, it does not open anymore.

Now Apple has also distributed the update to fix this bug.
<i>While fixed in the upcoming iOS 11.3, Apple has confirmed that it will roll-out the fix in a minor iOS update coming soon.</i>

<a href="https://www.gsmarena.com/new_major_ios_bug_can_crash_most_of_your_messaging_apps-news-29643.php">Source of this info.</a>

Another reason to like more Android!
This bug does not show up on Android phones.