Sun heart error

[Lesser spren]

The page for sunhearts states the following:

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 If not depleted, sunhearts can be given a small amount of Investiture, but this normally doesn't give it a substantial amount of Investiture.^[5][8] If a depleted sunheart is left back into the sun of Canticle, it will not recharge as the Investiture just passes through the sunheart, instead of being captured by it.^[18][7] If there is still Investiture in them, sunhearts can be recharged in the sun, since the soul is resisting the Investiture, causing it to flare and be captured in the sunheart.^[7][17]

This passage seems to imply any undepleted sunheart will be recharged. This is a false assumption. Chapter 45 of The Sunlit Man states a nondepleted sunheart must be primed with investiture from another source, (either a living canticlite donor or something else) in order to be recharged.

[Cephandrious Maxtori Fae/Faer]

Wasn't the statement just that the sunheart needs any investiture present?
 

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Anything trapped between the sun and the core is like…like interference between two opposite electric poles

My reading was that any investiture in the Heart creates resistance, charging the heart