Manual URL's in TinyMCE are broken when using multiple languages

[MrTango]

BUG

What I did:

when links are inserted directly as HTML or by using the external link field of Tinymce, the links are broken when more then one language is active. Because the links are missing the language folders.

What version of Plone/ Addons I am using:

Plone 5.2
Plone 6.0.3

[thet]

@MrTango I don't think that #3765 will address this problem.
Can you give more details on this error? Are there any console errors?

[MrTango]

when you insert a link in external link field in tinymce, but the link has actually the same domain, tinymce will convert it to a relative link which does not work when you have language folders

[thet]

That's then a problem with ResolveUIDAndCAptionFilter in plone.outputfilters AFAIK.

[MrTango]

No it is the tinyMCE who changes this to a relative link.
You can check by looking at the html source, after inserting the link.
It will no longer have the full url but the relative link.

[petschki]

I think this is fixed by plone/mockup#1116