viber bot keyboard message issue not loading subsequent keyboard messages while giving inputs to the bot - viber-bot

I have a doubt regarding keyboard messages in the viber bot while giving inputs sometimes the keyboard loads and sometimes it doesn’t load sequentially.
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Telegram bot, session lifetime

I know that a telegram bot can't start conversation with the user. So user should click "/start" first. But for how long bot can respond to the user after the last message? Do any limitations exist like 24/48 hours?
Do any limitations exist like 24/48 hours?
No. After a user starts a conversation with a bot, the bot can send messages to that user until one of the following actions occur:
User 'Stop and blocks' the bot (See picture below)
User account gets deleted
For example, using the Desktop version, the user can 'Stop and block' a bot by pressing the following button:

Is there way to trigger a reactive event in a ShinyApp over the internet (e.g. trough an email)?

My friend and I are working in the development of a ShinyApp for our community. The purpose of the App is to create a distribution mailing list to share job opportunities. There are two tabs, a tab to subscribe/unsubscribe to the mailing list and a second tab to post a job opportunity.
Our app now is able to send the job offer posted automatically to all the recipients in the current mailing list. However, we want to be able to control the content of what is posted. So, we want to be able to preapprove the mails before sending to the mailing list.
Is there a way to get a responsive email from which the administrators can just press an "Accept" or "Decline" button to either deliver or reject the job offer?
We have certain ideas:
Send the response to our ShinyApp and deliver or reject the message from our ShinyApp. Can Shiny receive an input (e.g. an action button) from outside the App?
Create a customized message that Gmail somehow understands to deliver/reject the message automatically.

As a group admin of telegram supergroup, how can I disable link previews

Telegram by default enables link previews for messages. I have created a bot in python that monitors the group as Admin and verifies that there are no vulgar messages (by analyzing message text for certain slangs). Next I want to improve the bot so that it can disable/delete any messages which have link preview enabled. I have looked into message object and there is no information which I can use to know if preview is enabled or disabled in a message posted on supergroup.
Has anyone encountered same issue and were you able to solve it?

Facebook Messenger Bot - Pass control from the bot to human and enable keyboard input

This was probably answered but I can't find any.
I have a bot with disabled composer input. So it is controlled by buttons only. All messages appear in 'Done' folder as expected. But when I want to pass control to the human (switch to the Secondary Receiver) composer input will still be disabled.
Is there any solution to enable input when transferring chat to human and disable again when Bot controls again?

Message contains quote from the bot when I send it using custom keyboard

I'm using custom keyboard (old-style, not in message as in platform 2.0) to send messages to my bot. For example, I need to reply with a single letter. If I just press it on my android keyboard everything is fine. But if I send it using custom keyboard in my message in the chat I see something like
| Name of the bot
| Part of the bot's last message
A
Where 'A' is a single letter that I want to send. Is it possible to avoid this visual garbage (lines 1, 2)?
Thanks!
After investigation I saw that it is an issue only for latest (for the question's date) Android version of Telegram.
UPD: Today (16.05.2016) Telegram released new version for Android that fixes this issue.

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