Bug report 3.4.2

Windows 10 Home
Version 1909
OS Build 18393.1556

AUdacity 3.4.2

Recording vinyl albums.
Captured stereo waveform
Performed Click Removal
Carrying out Noise Reduction after getting noise profile
In the progress pop-up showing elapsed time and time to go,
when both times are equal, the progress goes to 100% and time to go is set to zero although process continues until the initial time to go has elapsed.
e.g. initial time to go 1m 20s
When elapsed time reaches 40s and time to go is reduced to 40s, then time to go is set to 0s while elapsed time counts up to 1m20 then pop up window closes.

The function is still working correctly, just the pop up window is faulty.