@micker can you add some more information? What version of Joomla?

Have you try the current beta? https://github.com/joomla/joomla-cms/releases/tag/3.4.0-beta1

Is it a specific module type

yes beta 1
custom module sometime...
in same page => some one can be edit .. and other not, alway redirect to same page (loop)
it's realy strange

I can't replicate this. Can you send me access via the contact form on my blog http://brian.teeman.net so I can try yo replicate it

Thanks for sending the details.

I was able to edit all the modules EXCEPT for the ones that you specified in your email.

I suspect it may be an issue with your template as I can see some issues with it. For example if you switch to protostar you will see that you have Bauzelle" /> on screen in the top right.

i checkedmore ... i am not sure about template i found this code in header
Toulouse" />
=> that broke html in front
maybe it's in relation with an other error in backend
menu edition view
ReferenceError: $K2 is not defined
$K2(document).ready(function () {

sorry i forgot => protstar have same problme with html

I think it is fair to say that you have an issue on your site that is
showing itself in multiple ways one of which is in the front end module
edit feature.

sorry i forgot => protstar have same problme with html

This comment was created with the J!Tracker Application
https://github.com/joomla/jissues at issues.joomla.org/joomla-cms/5927
http://issues.joomla.org/tracker/joomla-cms/5927.

—
Reply to this email directly or view it on GitHub
#5927 (comment).

it's maybe a editor problem ...if i desactived arkeditor no error but acl heritage is strange => report to ark team
.. continu here
http://issues.joomla.org/tracker/joomla-cms/5397

Closing as problem is resolved when removing non core extension