Update: A Mojira moderator has told me to merge MCPE-180074 into this report. I have updated the description, attachements, and title to reflect this merge

According to the official docs the "minecraft:damage" component supports an integer type. However, upon further testing, it seems that it uses the following formula:

value = value % 256

rather than using the actual value.

More so, the component seems to be using a signed 16-bit integer which causes unexpected/unwanted behaviour. This causes certain ranges of values to appear as negative which causes the Bedrock Engine to think the value is a negative number, even if the value is a positive number. This occurs due to the 2's complements for 16-bit integer. The negative ranges formula is, inclusive beginning and exclusive ending where x can be any arbitrary number.

[256*(256x+128), 256*(256(x+1))) 

As an example, if x is 0, the range for negative values are [32768, 65536) which the below reproduction method below supports

Reproduce:

• Download the attached pack below(As of 27/08/2024, I have attached an updated version to keep the item format and min engine version to 1.21.30)
• Import the pack into Preview 1.21.30.24
• Give yourself the following items:
  • mojira:damage_255
  • mojira:damage_256
  • mojira:damage_257
  • mojira:damage_32767
  • mojira:damage_32768
  • mojira:damage_32769
  • mojira:damage_65536

• Open your inventory and hover over the items

Expected Result:

• mojira:damage_255 should have a "+255 attack damage" tooltip
• mojira:damage_256 should have a "+256 attack damage" tooltip
• mojira:damage_257 should have a "+257 attack damage" tooltip
• mojira:damage_32767 should have a "+255 attack damage" tooltip
• mojira:damage_32768 should have no "attack damage" tooltip
• mojira:damage_32769 should have a "+1 attack damage" tooltip
• mojira:damage_65536 should have no "attack damage" tooltip

Actual Result:

• mojira:damage_255 has a "+255 attack damage" tooltip
• mojira:damage_256 has no "attack damage" tooltip
• mojira:damage_257 has a "+1 attack damage" tooltip
• mojira:damage_32767 has a "+255 attack damage" tooltip. The item does parse correctly.
• mojira:damage_32768 throws a content log error. The item does not parse correctly thus rendering the item broken.
• mojira:damage_32769 throws a content log error. The item does not parse correctly thus rendering the item broken.
• mojira:damage_65536 has no "attack damage" tooltip. The item does parse correctly.