Message "No ACK back Start failed" pops up after pressing the button to start recording

[m1ndl3zz]

Flowshutter 0.66 Message "No ACK back Start failed" pops up after pressing the button to start recording. Then only restarting the system helps.

Steps to reproduce the behaviour:

1. Turn on the device
2. Short press the enter button to start recording.
3. Record.
4. Short press the enter button to stop recording.
5. After several seconds, repeat the steps from step 2
6. Error message will appear eventually on step 2