In addition to the Held chord, make sure your song's length goes well beyond that last chord (Bar for End of Chorus, or the last bar of a Tag).

Turn off the automatic 2 or 4-bar ending.

One trick I do is to go many measures further on and put a 'stopper' chord in, like C. (C with one period after). This chord can be anything EXCEPT the chord being held.

Then I also silence the chord BIAB automatically places at the end of the song, by adding a single period to that, too.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.