I have a template that works fine in Joomla 3.9.1. and in Joomla 4 Alfa 1 to Alfa 3.

But stoped work in latest Joomla4 Alfa versions, Alfa 5 and Alfa 6

The template should show an horizontal menu like this
Instead it shows a menu like this
You can see the html generated by version J4 Alfa3

and by Alfa 6
.
The problem is on last line. Alfa6 generates <ul class="menu"> instead of <ul class="lcp-hmenu"> .
After debuging the file lcp_template\html\mod_menu\default.php I found that the array $attribs['name'] is not set. Because of that the line
if (isset($attribs['name']) && $attribs['name'] == 'user3')
is never excuted.

Steps to reproduce the issue

install the attached template, lcp_template Make it the default template and assign position user3

Expected result

Actual result

System information (as much as possible)

Windows 10 with Apache 2.4 + PHP 7.1.2 + Mysql 5.7.17 + Mysqli driver ( the same happens with PDO driver)

Additional comments

I can't send the template so that you test it. How can I overcome the problem