Lexicons which use "(r)" for the R-sound cannot be played via the System voice backend

From the feedback channel:
> Examples of current lexicons which break:
> Characters-Locations-System/lexicon.pls
> • Fordola fo(r)ˈdəʊlə
> • Lydha Lran ˈliːdəə lɜ(r)ˈæn
> • Eulmorean juːlˈmɔː(r)ˌən
> • Eulmoreans juːlˈmɔː(r)ˌənz
>
> Special case:
> • Eulmore ˈjuːlˌmɔː(r)
> - Eulmore is the only phoneme with will play the (r) sound correctly, perhaps because no other sounds follow the parentheses?