Hello - I have the same issue with Just Flight‘s traffic product and this was their reply FYI:
„The issue regarding Ai traffic landing halfway down the runway was first reported to Asobo/Microsoft during the Sim Update 12 beta and unfortunately, it wasn’t fixed in time for the full public release.
As this is an issue with the core MSFS traffic engine, the issue is sadly out of our control and we can only hope that the issue will be fixed in the MSFS Sim Update 13, which we believe is scheduled to release in September.“