Creative inventory copper golem statues don't stack with mined or pick-blocked versions

The bug

A copper golem statue from the creative inventory doesn’t stack with a version that has been placed and pick-blocked, and neither of those stack with a version that’s been placed and mined.

How to reproduce

1. Get a copper golem statue from the creative inventory

2. Place it

3. Use pick block (middle click)

4. Enter survival mode

5. Break it with a pickaxe and pick up the item

Expected results

Pick block should give you the existing item you placed. The mined item should then stack with that item.

Observed results

You have three identical but non-stacking items.

Notes

This is not a duplicate of MCPE-225273, which is about statues that came from living copper golems. These statues never came from a living golem and therefore have no data.

Cause

The item from the creative inventory has no tag. The pick-blocked item has a tag with a Pose. The mined item has a tag with both a Pose and Actor.