Bad feedback from the screen reader during the process of sending a voice message

Impression ImSmart C551 (Mediatek 6580). Android 6.0. Android Accessibility Suite (Talkback), or Jieshuo Screen Reader.
Steps to reproduce:
1. In any chat, focus on the voice message recording button;
2. Double-tap and hold this button to start recording a voice message;
3. When you have finished speaking, lift your finger to start sending a voice message;
4. During the process of sending a voice message, try to get feedback from the screen reader. It is probably best to test this on a slow internet. For example, try swiping right or left, or swiping your finger across the screen.
Actual result: the screen reader does not talk to me, or talks, but with a very long delay.
Expected Result: I get instant feedback from the screen reader.
I can reproduce it on different versions of Element for Android.
I will be grateful for your attention to this issue.