With a low probability, @mention may be treated as a regular tweet and displayed on the follower's timeline


Hi Twitter Staff

I’m developing an automatic mention program.
I’m in trouble because the same problem as Topic below has happened.

The API response of the error tweet is below.

"user_mentions": [], // blank array
"in_reply_to_status_id_str" : null,
"in_reply_to_status_id" : null,
"in_reply_to_user_id": targetUserId
"in_reply_to_user_id_str" : "targetUserId",