I’ve created a bug report about Hold Short changing to a different location, as I too am experiencing it. Seems more prevalent after patch 1.2.8.
https://forums.flightsimulator.com/t/hold-short-changes-to-a-new-location-once-i-get-a-few-feet-away-from-it/689726
I searched for a previously made bug report using the keywords ‘Hold Short’ and a tag for MSFS2024 and couldn’t find a report. Apparently there was one from a couple of weeks ago. So my report got merged into that one.