If Recording is paused and resumed and duration property is used to report the duration of recording the first time paused and resume the duration seems right. However, when pause and resume for the second time, the duration almost doubles.

also it is noticed that if a new recording is started pausing and resuming the previous recording a couple of times, the duration from the first recording get carried over to the next.

This can be seen with Qt's Audio Recorder Example.
Attached is screen recordings.

Please note, Recorded media duration seems right only 'duration' property seems reporting it incorrect.