Bug: The app's sound does not work properly

[darewealth]

Expected behavior
I expected that when I switch on the sound feature, every count should give a sound.

Actual behavior
When I switch on the sound feature to make some count, the sound only works once, and it does not work on a continuous count.

How to reproduce

• Launch the app
• Go to setting
• Enable sound
• Go back to the counter
• Click to count on addition
• The first count will give sound, but it won't on the others.

App version: 20

Operating system: Android 6.1

Device: Itel

Recording Of The Bug
https://youtu.be/VoxrGvHMpww