sorry to say but this is data independent, means this is a internal limitation in the sim. This strange things (truncated waypoints, wrong paths, strange linkage between STARs and approaches) are confirmed by ASOBO/MS in their developer 3rd party forum and also in the communication between ASOBO/MS and us.
We can only wait till this internal logic is fixed - this happens an all in-game aircrafts and in on the world-map and as I wrote, data independent - so also with the stock data from NavBlue.
What I want to try is the Working-Title CJ4 because the guys have developed a complete own flight-planner logic for this FMC and this mod interprets the data nearly perfect. The linkage between STARs, Approaches (including transitions) works as expected. It is really worth a try. The FBW guys are also working on a complete independent flight-planning FMC (currently they use also the internal logic of the sim with all these limitations and strange issues), so I guess in the near future, we have at least two very good mods which interpret the navdata correctly.
Here the BLM2G STAR to ILS28 into Zürich on the WT CJ4 FMC
as an additional - with the missed-approach part:
… and here the final on the navigation-display
And here the NIMA2L arrival for 28L into Dublin:
You see, the data is completely identically to the charts and the WT CJ4 interprets the data nearly absolutely correctly. Of course, there is also a lot of improvements possible but all in all, it looks very good and you can fly IFR without any strange waypoints, truncated waypoints or strange turn-arounds.
So, it´s really worth to look deeper into the WT CJ4 … sorry, the in-game flight planner doesn´t interpret the data correctly and the ASOBO/MS logic is a little bit hard to get used to …