Remaining send keep counting

Hello,

There is any way to only show how many mails remaining on status info?
In version 2.10 the number keep still and only update when send new ones. I attached images for better understand what I say. On 3.6 the count reduce to 0 and only keep “in progress”, when the cron start the task again (every 5min) the count starts.

old version
old version

new version
new version 1

new version 2 seconds after first screenshoot and so on
new version 2