When Vision asks Wanda about her brother and how he's "great with kids", he gives a thumbs-up saying so. When the shot switches to the boys and Pietro finishing their drinks and burping, Vision's thumb is no longer raised. Cutting back to Vision and Wanda, Vision's thumb is back up again.
When Monica Rambeau and Jimmy Woo are talking to Darcy before heading into the Hex (21:10), the time on the digital clock behind them jumps back and forth, sometimes showing 13:14, 13:19, 13:18 and 13:15, suggesting that the shot was not a single take, but multiple shots were spliced and edited.
A flashback shows Wanda and Pietro having gone trick-or-treating as children in the 1990s. Wanda and Pietro are established to be from a country in Eastern Europe, not the United States.
However, it is revealed further down the series that this flashback was not real.
However, it is revealed further down the series that this flashback was not real.