Most often this is caused by third party links that are being used such as with link shortners or link trackers such as bitly. They sometimes tend to strip the affiliate ID from your Yoonla affiliate link in which tracking won't work properly.
This is with 3rd party tracking links and is completely out of our control.
Please watch the video below on how you can verify that your Yoonla™ affiliate link is working and tracking properly when using a 3rd party link tracker/shortner or even in Facebook posts as Facebook converts your link to a Facebook link first before re-directing it to your affiliate links.
Also ensure to check on both computers and mobile devices.