It can be a little annoying when you can't get to the maximum actions every day.
Linvo performs actions every 15 minutes (to keep you safe with Linkedin - it's not changeable.).
Your campaign can be affected by the following factors:
You have added too many steps to your workflow - remember, one step in 15 min.
You have not put enough hours in your working hours.
You have one account that's is being used as a scraper in many campaigns.
They have to take care of the other accounts, and they don't perform their actions.
Your scraper account is not on working hours, and the other accounts are waiting for more connections.
You have created a connect campaign on 2nd and 3rd-degree connections (that's very common, and you will usually see many failures).
You have created a new campaign with almost the same filters. You are trying to connect with people you have already connected with.