why the progress bar has stopped, or reached the max, and the job is still running?
The graphic progress bar try to guess the job progress, but if you need a real time report of the job’s progress the native console mode is more detailed and accurate. In Options > Settings first tab, in “Backend binaries interface” dropdown menu, you can set PeaZip to display both the GUI and the console window if you want to have both a graphical interface to control the job and a detailed, real time report on ongoing activities in the console window.