Size Column to PDF report

[Kibishi47]

Hello,
Some time ago, I created a PDF template for a work report, I had made a table that describes the tasks performed.
But today (or before but I had not seen), the size of the columns of my table is not fixed anymore and that creates me big problem with texts totally flattened.
How can I fix it ?

The template :

The Result :

[Marc_Dillon]

Do all the other columns have a set width?

[Kibishi47]

Yes, all column have the same set width

[Kibishi47]

Not exactly the same size but relatively close