Steps to reproduce the issue

On Joomla! 4.0 dev
open administrator/components/com_content/forms/article.xml
add second editor field

<field
				name="articletext2"
				type="editor"
				label="COM_CONTENT_FIELD_ARTICLETEXT_LABEL"
				filter="JComponentHelper::filterText"
				buttons="true"
		/>

open administrator/components/com_content/tmpl/article/edit.php
add code to display the additional field after

<fieldset class="adminform">
					<?php echo $this->form->getInput('articletext2'); ?>
                </fieldset>

for example after

<fieldset class="adminform">
					<?php echo $this->form->getInput('articletext'); ?>
				</fieldset>

Go to administration of the website, create a new article

Expected result

the second editor field looks exactly like the first

Actual result

Under the second editor field you can find an erratic string
Joomla\CMS\Object\CMSObjectJoomla\CMS\Object\CMSObjectJoomla\CMS\Object\CMSObjectJoomla\CMS\Object\CMSObjectJoomla\CMS\Object\CMSObjectJoomla\CMS\Object\CMSObjectJoomla\CMS\Object\CMSObject

Status

Category *
Editor

Featured
No
Access

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Version Note
This issue

System information (as much as possible)

Php 7.1.7 on local Xampp on windows 7
Joomla! 4.0.0-dev Development [ Amani ] 31-March-2017 23:59 GMT
(Hopefully the latest version. I downloaded this morning from Github and no matter which options I choose for the Joomla! Update component, I already get the message that I have the latest version).

Additional comments

I'm pretty sure, that the problem is related to the editor buttons, which are created as objects of class Joomla\CMS\Object\CMSObjectJoomla. It looks to me, that the erratic string has as many repetitions of this class as the first editor has buttons. When I add a third or forth editor, the string grows even longer.