System uncheck Primary Location of Theme locations when add many menu items

[Eric2011]

I am working on a site which have many menu items, say about 100.
Current setting about Theme Locations is that the checkbox of "Primary Menu" is checked.

But System unchecked the checkbox after I added one more menu items, which mess up the navigation menu in front.

Correct menu display before adding one more menu item

Error screenshot

affected setting. The "Primary Menu" is unchecked automatically after one new menu item added

Hi Eric,

Thanks for the report, though I can't seem to reproduce your issue on current trunk.

I wonder if you can give us a little more information about your issue. When you saved your menu, is it possible that the browser timed-out or froze in the midle of the saving process? Or did it simply save your changes and on the next viewing the location checkbox was unchecked?

Sounds like #14134 to me.

Hi,

No time out or frozen in the middle of the saving process. And yes, on the next viewing the location checkbox was unchecked.

Replying to DrewAPicture:

Hi Eric,

Thanks for the report, though I can't seem to reproduce your issue on current trunk.

I wonder if you can give us a little more information about your issue. When you saved your menu, is it possible that the browser timed-out or froze in the midle of the saving process? Or did it simply save your changes and on the next viewing the location checkbox was unchecked?

Hi Nacin, Thanks.

I read #14134 before I create this ticket. It looks similar, but no one mention any setting changed in the process. So I open this ticket in case it is a new issue. Also wish somebody can confirm it if it is same issue to #14134

Replying to nacin:

Sounds like #14134 to me.

Can be solved by add below in .haccess

<IfModule mod_php.c>
php_value suhosin.post.max_vars = 5000
php_value suhosin.request.max_vars = 5000
</IfModule>

or add

<IfModule mod_php.c>
php_value suhosin.simulation 1
</IfModule>

And the magic words are "max_vars".

Closing as a duplicate of #14134.