When you want the Ally to follow it gets stuck in glass panes and probably other non-full blocks. (BTW this has been happening since 1.19.0)

Steps to Reproduce:

  [Step 1]

somehow get an Ally in a glass pane
  [Step 2]

watch it not follow the player as it should
 

Observed Results:

Ally doesn't follow player because it's stuck

Expected Results:

Ally should follow the player