I came across an intriguing set of characters that seem to cause android activities to hang when they are tapped (only android). I'm curious as to whether this is some kind of character combination or some left to right thing recognized as something else.
If you touch the👇black point then your whatsapp will hang(freeze)
<⚫> 👈🏻 ereh-hcuot-t
It's because the string contains a lot of "U+200F" and "U+200E" chars and the phone can't handles it.
If you check the hidden chars in the string (like for a new line) you can see them... (you can use https://www.soscisurvey.de/tools/view-chars.php to check them)
Thats al I know about it...
EDIT: The last 2 chars of the string are actually different, first "U+2067" and then "U+202E"
And those 2 even works on this site