Sylvan's Effigy mod disappears when pasting

The You can have any number of Companions of different types gets removed.

Item Class: Sceptres
Rarity: Unique
Sylvan's Effigy
Stoic Sceptre
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Quality: +20% (augmented)
Spirit: 172 (augmented)
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Requires: Level 62, 12 Int
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Sockets: S S 
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Item Level: 84
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Allies in your Presence deal 80% increased Damage (rune)
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Grants Skill: Level 19 Discipline
Grants Skill: Level 19 Azmerian Wolf
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{ Unique Modifier }
72(50-75)% increased Spirit
{ Unique Modifier — Life }
Allies in your Presence Regenerate 95.7(50-100) Life per second
{ Unique Modifier — Attribute }
+9(6-12) to all Attributes
{ Unique Modifier }
Companions deal 83(50-100)% increased damage to your Marked targets
{ Unique Modifier }
You can have any number of Companions of different types — Unscalable Value
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Darkness howls through ancient bones, a wistful cry
on hollow winds. The moon listens. The pack gathers.
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Corrupted

Reproduce the issue by pasting the supplied Sylvan's Effigy text into Path of Building PoE2 and trace the item-import parsing entry point. Compare the pasted modifier list with the resulting item data, then verify that "You can have any number of Companions of different types" remains present after the fix.