Migration from 3 .1.2.1 to 3.3.0.8 - Article order in some issue

Description of issue or problem I’m having:
I’m working to update our system from 3.1.2.1 to 3.3.0.8 .
We host multiple journal.
In some issue of one journal the dysplay order has changer in frontoffice and in back office

Frontoffice
Before
image

After
image

Backoffice
Before
image

After
image

I know i can reorder in the backoffice but i would like to identify the problem rather than reorder all the issue(=> it’s going to take me some times)