>>534167616
>>534168137
That is what happened, yes. She was out of action for like a year while her throat got treated. I think Mashu's seasonal lines in the mission menu went unvoiced for a while until they figured out whether it'd be feasible to hold the role for her.

https://www.animenewsnetwork.com/news/2017-08-04/risa-taneda-recovers-from-treatment-gradually-returns-to-voice-acting/.119736