In early 2019, Foskett took leave from the Beach Boys due to undergoing throat surgery. In late 2019, Foskett announced that he had been diagnosed with stage 4 anaplastic thyroid cancer in early 2018 and that his falsetto vocal range has heavily deteriorated as a result of several surgeries and treatments on his vocal cords. In addition, he said he would release his next album "Voices", which he said may possibly be his last album as a solo artist, on November 22, 2019, though added that he would also continue as a live musician and possibly explore doing record production work.