I have a similar issue on my iPhone app after installing the last update this week (version 2.11.1 for iOS). My default speed setting was 1.0x, but the app always played at 0.5x after answering on the auto-play mode. I tapped both the turtle mode (1/2) and the normal/default mode buttons, but the two modes functioned identically.
I changed the default speed setting from 1.0 to 1.5, and then played a new lesson from scratch. Now it plays at 0.75x right after answering (i.e. 1.5 times 0.5 is 0.75.)
My settings offer only two options for voices in Indonesian sourced from Apple. So, I’m not sure if the same issue also occurs when playing with a Clozemaster original voice.
I guess the last update applied the half-speed mode both to the normal button and to the 1/2 turtle button.
Thanks for letting us know and sorry for the trouble! Fixes have been implemented in 2.11.4. Please let us know if you’re still seeing/hearing any of the issues above, or if anything else has come up in the meantime. Thanks again!