I'll ask @PeterCase to chime in but my understanding is that this is intended. Some of those trackers are used to monitor searches and track articles viewed, which helps us maintain and improve our knowledge base.
Hi @TomU, confirming what Pierre says above. We use different combinations of tracking software on our more popular eSupport pages to understand:
What our visitors are using the site for
Whether they are completing what they set out to do
If not, understand why not
We also "power" some of our tools using data from our tracking. That's why, for example we don't list an article you've recently accessed as a "Suggested Read" on the Home Page.
We'll take a look into why this page is particularly sensitive to this and other ad-blockers (see also the pinned post on UBlock Origin). We're planning to replace our search platform over the coming 1-2 years and possibly the front end for our next generation search will resolve this for us.