From version 0.18.0
all platform specific flags (like the send message silently and modify previous message in Telegram) are moved to the Params node .
The reason behind this is
Existing flows using the Telegram’s silent message and modify previous message should be updated adding a Params node , for example to modify the previous sent message instead of sending a new one, just add a parameter, select platform Telegram then select “Reply to message” and then type {{messageId}}
Modify message flow