Ajax request sent after pressing clear button on single or multiple

As per the title really. When you click on the clear all button on a Ajax enabled select2 (either single or multiple), the action ultimately fires a request to the ajax source.

I have found 1 other mention of this in Prevent select2:open when clearing selection#3320 where @kevin-brown comments on a post by @nafetsrybak with the same issue and suggests he creates a bug - however I cannot find if a bug was raised or not.
I have implemented the solution to keep the dropdowns closed after clear all which is visually good, but I need to stop this call to ajax as well. Any ideas?
Many thanks in advance.