Telegram on iOS crashes when browsing stickers or gifs longer than 30 second
If you open the sticker/gif panel when entering a message, flip, twist, rotate, no matter how, but view them, 15-20 seconds - the application crashes. Steps to reproduce Entering a message; Click on the…
As it's not marketed, it seems like you can simply import your history and combine both whatsapp & telegram chats in 1 (in order to delete your whatsapp)
at least provide users more information how the import works or what the result looks like
“Messages will be imported into the current day but will also include their original timestamps. All members of the chat on Telegram will see the messages.” from https://telegram.org/blog/move-history