Rows count seems inacurate

Hi,

i’m trying to clone a website as i usually do. (Done this ten times)
But i haven’t try it since 5.9.
Today i tried but rows count show : 1327 entries.
So i wait, the progress bar is complete at 100%.
But, rows count show : 84025 (something like that and counting down) on 1327.
I let it run for about 4 hours but i never completed the task.

So, i thought it might be a glitch.
Then i restart a cloning process.

Rows count this time stil 1327 entries but the process came to 34527 and counting up this time.

So i’m a little bit confused.

Is it a bug sinc the last release of WP ?

Best regards