I am currently trying to send some payload via deep linking, and it seems there is a maximum length limit of 64 chars to be added after the start parameter in the url.
I tried both plaintext and base64 encoding and when I enter more than 64 chars, the listener for /start is not triggered. I am using telegraf js library.
Example link:
https://t.me/EXAMPLE_BOT?start=1233456771121212121212121212121212121212121211111212121212121212
Can anybody else confirm this with their bot? I couldn't find any hints on that in the deep-linking doc