We have a limitation that you cannot select more than 1000 items. This sort of limitation is present in many web apps since browsers cannot deal with huge amounts of data being active and being interacted with at the same time.

If you upload 1000 items or less, the link generator and the items selection are going to be fine and work correctly.

However, if you upload more than what can be selected, we have an issue with it being unpredictable which images will be uploaded when, hence we cannot in a stable way add them to your selection in the main window and generate the link code.

This can be an unexpected surpise for our big customers.

The solution is to disable the auto-selection in such cases. It's better to not provide anything than provide unreliable data. Selecting the items and generating the link code after upload will work fine and is not hindered by this issue.