Unexpected voice changes in video rendering: Seeking solutions

Yesterday, my team and I encountered an issue where voice selections were unexpectedly changing in our videos.

We generated a new video using a Gemini voice, and after rendering, the selected voice still appeared correctly in the voice dropdown. However, when we played the video, the actual voice and accent had changed to something different.

We tried regenerating the video multiple times and manually updating the voice settings for each scene, but the issue persisted. Has anyone else experienced this behavior or found a solution? Or was this simply and known and corrected issue?