pipecat/changelog/4415.fixed.md

• Fixed ElevenLabsTTSService and ElevenLabsHttpTTSService producing merged words (e.g. bookLook) when using Flash models. Flash often splits sentences mid-stream into alignment chunks that begin with a real inter-word space, but the previous fix unconditionally stripped that space from every chunk. Leading spaces are now stripped only on the first alignment chunk of an utterance, so subsequent chunks correctly flush partial words across boundaries.