After deleting some Units the "referenced units" count is incorrect

Problem/Motivation

originally reported here https://www.drupal.org/project/bee/issues/3138905 ✨ How to delete units by booking Fixed

We just hit this problem too - after deleting some Units the "referenced units" count is incorrect which messes a lot of things up.

Drupal 10.3.10

BEE 8.x-3.1

Steps to reproduce

Delete a unit then view the 'referenced units' on the node