URI bug with empty container_suffix

[zooks]

When I set "container_suffix" to empty string in MODX Friendly URL settings, it causes the problem:

articles/tags/mytag became
articlestags/mytag
and
articles/2015/10 became
articles2015/10

where "articles" is the name of the articles resourse.
The same problem repeated when "isfolder" is set to 0.