Joomla 4 - Admin Cpanel - Module/Bootstrap size to 12 or 6 or 4 doesn't work like Joomla 3

[fuscage]

Steps to reproduce the issue

In Joomla 4.4.4, go to the panel administrator, modify all the "bootstrap size" modules (in advanced tab) to have these positions :

[ module size 12 ] => 1 full column [ module size 6 ][ module size 6 ] => 2 full columns [ module size 6 ][ module size 6 ] => 2 full columns [module size 4][module size 4][module size 4] => 3 full columns

Expected result

[ module size 12 ] => 1 full column [ module size 6 ][ module size 6 ] => 2 full columns [ module size 6 ][ module size 6 ] => 2 full columns [module size 4][module size 4][module size 4] => 3 full columns

Actual result

[ modal size 12 ][ module size 12 ] => 2 full columns [module size 6] [empty space] [module size 6] [empty space] => 2 columns (with empty spaces) [module size 6] [empty space] [module size 6] [empty space] => 2 columns (with empty spaces) [md4] [empty space][empty space] [md4] [empty space][empty space] => 2 columns (with empty spaces) [md4] [empty space][empty space] => 2 columns (with empty spaces)

System information (as much as possible)

joomla 4.4.4

Additional comments

in joomla 3, I have these positions of modules (in admin cpanel) :

[ module size 12 ] [ module size 6 ][ module size 6 ] [ module size 6 ][ module size 6 ] [module size 4][module size 4][module size 4]

but in joomla 4.4.4, I have these positions of modules (with empty spaces) :-(

[ modal size 12 ][ module size 12 ] [module size 6] [empty space] [module size 6] [empty space] [module size 6] [empty space] [module size 6] [empty space] [md4] [empty space] [empty space] [md4] [empty space] [empty space] [md4] [empty space] [empty space]

Thank you in advance for your assistance

[brianteeman]

Unfortunately this is as a result of the atum admin template using a masonry style layout for this page