Text to speech stops working after a period of time.

An indefinite period anfter entering a world (local or server) the text to speech stops working (mutes?) and the only way to re-enable it is to exit the Minecraft app and restart.

In the past the problem would always occur on task-switching away whilst in a world and then on task-switching back to Minecraft the TTS would have muted. More recently (in the last two years or so) the TTS would sometimes mute spontaneously after a considerable length of time (hours). Now however after 1.21.94 Hotfix was released it happens a random time after entering a world.

Last night it happened at 01.30, 02.00, 02.24, 02:26, 02.27, at that point it stopped working altogether! It worked in the menus, but on entering the world, it stopped. This persisted for about an hour, after which it started working again.

Please fix this quickly; as a sight-impaired gamer, this is the feature which allows me to play. Without TTS I cannot play Minecraft at all.