Several in-game effects, such as all the paladin's auras (PHB p. 85) and spells like Aura of Life and Aura of Purity (PHB p. 216), are passive auras that radiate from the point of origin (usually a creature). The descriptions contain language similar to:
… each non-hostile creature in the aura (including you) …
… you and friendly creatures within x feet of you …
Do these auras affect creatures who are within the range of the aura, but behind total cover?
Example 1: A paladin stands with their back against a wall. On the other side of the wall is an ally who is within 10 feet but behind total cover. Does this ally get the paladin's Charisma modifier added to their saving throws because of Aura of Protection?
Example 2: A magic item has the following property:
While within 30 feet of the [magic item], a creature is under the effect of a protection from evil and good spell …
This magic item is small enough to be placed in a chest; doing so puts it behind total cover. Do creatures within 30 feet of the chest still benefit from the effect of the aura?
Based on these examples, it would make intuitive sense for auras to require line of effect, but I am having trouble finding explicit support for this in the rules as written. Applying the rules for Areas of Effect (PHB p. 104) would mean total cover blocks auras, but are these rules applicable to non-spell class features, such as the paladin's auras?