When a team has a set color (this example will be yellow), but an entity with that color is invisible AND glowing, some strange things happen.
When visible, the entity should have a yellow outline (as opposed to the default white). When invisible, however, the entity's outline turns white.
What is REALLY strange is that any visible parts of the entity (items, armor, etc) will have the correct colored outline.
NOTE: if a team member is looking at fellow team member with gamerule "seeFriendlyInvisibles", the effect is not present. It is only when the entity is entirely invisible.