When using Memory of the Past (MOTP) together with Macabre – Call of False Prophets, some attribute upgrades — such as generic.max_health — do not work correctly.
In the MOTP UI, the max health value appears increased, but the actual player attribute is not updated.
I confirmed this by using the following command:
/attribute @s minecraft:generic.max_health get
→ The value remains unchanged despite the MOTP upgrade.

Expected behavior:
The generic.max_health attribute should be effectively updated on the player, not just visually in MOTP.

Environment details:

Minecraft version: 1.21.1

Mod loader: NeoForge 21.1.180

Memory of the Past: 1.7.0 (memory_of_the_past-1.7.0-neoforge-1.21.1)

Macabre – Call of False Prophets: 0.7.3 (macabre-0.7.3-neoforge-1.21.1)

Additional notes:

This issue does not occur when MOTP is used without Macabre.

No crash is triggered; the problem appears to be purely functional.