The aircraft in the FS Traffic fleet have been set up with the correct dimensions and airline codes as their real life counterparts, which allows them to park at the correct gates at airports which have the correct gate sizes and airline codes set up. If the airport scenery used does not have the correct gate sizes and airline codes set up, then the Ai aircraft will generate at random gates.

This should only be an issue at default MSFS airports which are Ai generated, but if you do find a third-party airport with this issue, we advise you to contact the scenery developer directly and hopefully they will be able to issue a fix.