Ephox issues with @ symbol

We are using Rx 6.5.2, and have noticed an issue with ephox changing text when an ‘@’ symbol or ‘http’ are in the link. an example:

we added an inline link to the following text: conference @ the SEC.
the preview is:

<p><a sys_dependentvariantid="408" title="" rxinlineslot="103" sys_dependentid="1917" href="http://devel1.sec.gov:9992/Rhythmyx/assembler/render?sys_revision=3&sys_siteid=309&sys_authtype=0&sys_contentid=1917&sys_variantid=408&sys_folderid=709&sys_context=0" inlinetype="rxhyperlink" sys_siteid="309" sys_folderid="709">conference @ the SEC</a></p>

the code of that is:

<p><a sys_dependentvariantid="408" title="" rxinlineslot="103" sys_dependentid="1917" href="http://devel1.sec.gov:9992/Rhythmyx/assembler/render?sys_revision=3&sys_siteid=309&sys_authtype=0&sys_contentid=1917&sys_variantid=408&sys_folderid=709&sys_context=0" inlinetype="rxhyperlink" sys_siteid="309" sys_folderid="709">conference @ the SEC</a></p>

upon updating the content editor, the text of the link is replaced with the rhythmyx url.

the preview:



<p><a sys_dependentvariantid="408" title="" rxinlineslot="103" sys_dependentid="1917" sys_relationshipid="498236" sys_variantid="408" sys_contentid="1917" href="http://devel1.sec.gov:9992/Rhythmyx/assembler/render?sys_revision=3&sys_siteid=309&sys_authtype=0&sys_contentid=1917&sys_variantid=408&sys_folderid=709&sys_context=0" sys_siteid="309" inlinetype="rxhyperlink" sys_folderid="709">http://devel1.sec.gov:9992/Rhythmyx/assembler/render?sys_revision=3&sys_siteid=309&sys_authtype=0&sys_contentid=1917&sys_variantid=408&sys_folderid=709&sys_context=0</a></p>

the code:

<p><a sys_dependentvariantid="408" title="" rxinlineslot="103" sys_dependentid="1917" sys_relationshipid="498236" sys_variantid="408" sys_contentid="1917" href="http://devel1.sec.gov:9992/Rhythmyx/assembler/render?sys_revision=3&sys_siteid=309&sys_authtype=0&sys_contentid=1917&sys_variantid=408&sys_folderid=709&sys_context=0" sys_siteid="309" inlinetype="rxhyperlink" sys_folderid="709">http://devel1.sec.gov:9992/Rhythmyx/assembler/render?sys_revision=3&sys_siteid=309&sys_authtype=0&sys_contentid=1917&sys_variantid=408&sys_folderid=709&sys_context=0</a></p>

this is also happening if we have a rhythmyx link around a full URL (e.g http://www.test.com).

is there a setting that allows these “special” characters?

Update:

This issue only seems to be happening if we edit the item in Internet Explorer (IE 7 is the standard here). When I edited the item in firefox, it did not change the text. Any thoughts on why this would happen in IE but not firefox?