Adding uniques from built-in list sometimes loses mods

[tabasavr]

Check version

• I'm running the latest version of Path of Building and I've verified this by checking the changelog

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• I've checked for duplicate open and closed issues by using the search function of the issue tracker

What platform are you running Path of Building on?

MacOS

How is Path of Building expected to behave?

When using import from built-in uniques list, all mods are kept

How does Path of Building behave?

When importing an item where first mod is unsupported and there is no implicit, then that mod will be lost. I've found two such items: Opportunity, Ultimate Life Flask and Lavianga's Spirits, Gargantuan Mana Flask.
This happens only with items that don't have an implicit. For example adding Zerphi's Genesis, Heavy Belt works correctly

How to reproduce the issue

1. Go to items tab
2. Select uniques for "Import from"
3. Find "Lavianga's Spirits, Gargantuan Mana Flask"
4. Observe that all mods are present in tooltip
5. Double-click the item
6. Observe that the first mod is lost

PoB for PoE2 build code

Screenshots

[tabasavr]

I've done some debugging, the problem happens in ParseRaw in Item.lua. We arrive at that if with

modList = nil
mode = "WIKI"
gameModeStage = "FINDIMPLICIT"
foundExplicit = nil

As a result, none of the branches get taken and the line never gets added to modLines.

When adding item with an implicit, we arrive at that if with gameModeStage = "EXPLICIT", so the last branch works.

When adding item manually via "Create custom", we arrive at that if with mode = "GAME", so the second branch works.

There's also an inconsistency with how modLib.parseMod works. If it returns {} instead of nil, then the first branch works. The mod will still be displayed as unsupported, but will not be lost.