Leyline of the Guildpack and Helio, Sun-Crowned devotion bug
The enchantment "Leyline of the Guildpack" doesn't work with "Helio, Sun-Crowned". In other words, non-white creatures don't grant white devotion.
As an example, you can see it working on Klothys and Nylea.
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YellowEyes#55015
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Rezzahan#77802 commented
Of course it doesn't count. After all, devotion counts MANA SYMBOLS among your permanents, not the number of permanets of that color. Heliod adds 1 to white, as does the Leyline. Can't make out the last one in your screenshot.
Klothys and Nylea each count two colors of mana symbols, and the Leyline alone adds 4 for Klothys, and 4 for Nylea. Not because of the colors, but because the Leyline has a whopping four green mana symbols.