Like most fans of the entertainment medium (aka nerds), those that have watched the MCU tend to ask a lot of questions. When Spider-Man: Far From Home showed that victims of "The Blip" were brought back to the exact moment where they disappeared, this made fans think that people who were in airplanes might have blipped back in the air, with no one to save them.
Director Jon Watts was asked this question by The Huffington Post and, if we're being honest, has probably been bombarded with it after Far From Home hit cinemas. Watts does have an answer but it'll either be seen as a copout or something that seems like a deus ex machina. It's not the worst thing ever - in fact, fans of the MCU will probably expect it - but some fans will be disappointed.
Future films might answer this in more detail but that might be more difficult than we think. The next film is probably Black Widow, which is a prequel and The Eternals is going to be a cosmic movie.
Spider-Man: Far From Home is now showing in cinemas.
Read:Spider-Man Far from Home: Jon Watts Talks About Bringing Back [Spoiler]