I agree, it is crazy that this is still an issue. But it's one I cannot fix myself because it's an issue with the Godot Engine itself; it's very likely due to the issue described in this pull request: https://github.com/godotengine/godot/pull/92532
I believe a fix will be added for Godot version 4.5, which is being worked on, so ideally that will fix it for Choicer Voicer as well, whenever I move the project to Godot 4.5