Plaits silence

Hi, Loving Plaits but sometimes when using Vowel and Speech Synthesis I cant get trigger to initiate any sounds, What am I doing wrong? All other Synthesis models continue to work.
Thanks for any help offered.

Last time it worked for me I used a gate. Perhaps a trigger is too short? Have you tried a Gate instead?

Edited to fix poor grammar.

Thanks for your advice. Nest time it happens I will use a gate. Makes sense. Thanks