Opener is not sent because a message has already been received
You receive some replies to your connection requests. However, once that happens, the opener no longer applies and you need to take action manually. After a few days, you have to scroll down a long way to find replies.
Answer:
In the Opener and Follow-up feature, you will find the Replies tab (see image).
There, you can use the paper plane icon to choose whether the opener should still be sent even though the contact has already replied.
Use the crossed-out circle icon next to it to set the status back to skip.
Use the globe icon on the far left to open the contact's chat.
The columns are sorted alphabetically by name.
You can scroll to the right in the columns and then sort by “added”.

