In ARCHICAD 19 interior elevation markers have the ability to limit the horizontal range, or be set to infinite.
Even with the Horizontal Range set to Infinite, the limited line exists, but is not active. This limited view line does however, impact the <ZoneName> auto-text naming for the I/E. It can rename the Interior Elevation to the zone its “off” extents line extends to. So if you find a stubborn interior elevation name, don’t jump to overwriting it right away. Turn on the Limited setting and review where that limiting line is set to. If you drag it back to the I/E marker boundary, then turn the Horizontal Range back to Infinite, the name should show up correctly.
Remember, there are many places and ways to override virtually everything in ARCHICAD, and most of them should just be avoided (the exceptions being anything built into the template).