Finding Strays - excessive time?

Master Shepherd seemed stuck on ‘Finding Strays’. Spend the whole day and most one one night whistling at one animal. I have witnessed this a few times - mainly as the annoying flute noise is constant anytime you are near the character.

Steps to reproduce:

  1. I created three maximum sized paddocks. One for each animal type.
  2. 3 Shepherds and just let them do their usual work. Eventually you will experience the Finding Strays behaviour.

Expected Results:
This may be expected behaviour. But I would suggest the amount of time it takes is excessive,.

Version Number and Mods in use:
release-687 (x64)

System Information:
Windows 10