Despite speculation of potential tension between the duo, Sánchez shared public well wishes as Chan celebrated her 40th birthday.
It's unclear if the two women were able to chat or not, but their lack of interaction may be due to the seating arrangements inside the capitol.
Sánchez - who is engaged to Amazon founder Jeff Bezos - was in attendance with her billionaire fiancé but eagled eyed viewers couldn't help but notice that the 55-year-old mostly kept her focus on her partner despite them being sat next to Zuckerberg and his wife.
The pair's distance was all the more noticeable due to the fact Chan chose to turn her focus elsewhere when her husband eventually sparked up a conversation with Sánchez.
Lauren Sanchez has shut down rumors of a rift with Mark Zuckerberg's wife Priscilla Chan after the pair were seen keeping a distance from each other during Donald Trump's inauguration in January.
