The postalveolar affricates /tʃ tʃʼ/ have alveolar allophones [ts tsʼ]. Variation occurs between speakers, and even within the speech of a single person.
The semivowel /w/ is realized as a bilabial fricative[β] when preceded and followed by identical vowels.
References
(Spanish) Crevels, Mily (2002). "Itonama o Sihnipadara, Lengua no clasificada de la Amazonía Boliviana". Estudios de Lingüística16.