ispconfig httpd log directories

[Captain]

Hello!

I have some questions about directories in ispconfig/httpd where we can find web users log directories.

Today I see 10 new directories with log files. And dir names looks like a url search:
dir name:
%22abcd0114307%22,%22abcd0169716%22,%22abcd0208181 %22,%22ms"

Inside directories we can see access.log files.

access.log inside:

414 329 "-" "-"
414 329 "-" "-"
414 329 "-" "-"
414 329 "-" "-"
414 329 "-" "-"
414 329 "-" "-"

We have one client that have this links in his web page.

%22abcd0114307%22,%22abcd0169716%22,%22abcd0208181%22,%22ms"

But why ispconfig create this directories?
It is normal?

I check this client access.log files in his log directory and also file have:
414 329 "-" "-"
this lines.

Thank you.