insert CSS stattements in Hubzilla Version 2.2

neue medienordnung plus
  last edited: Sat, 06 May 2017 10:56:18 +0200  
I want insert on this Hub https://hub.libranet.de/siteinfo with Hubzilla-Version 2.2 CSS stattements into one zen-Template - s. bottom. But Hubzilla may refuse to accept this
htmlhead-with-css <style type="text/css">
.mycolor {color: red;}
</style>

block. I had tried to save the css-block as text/html, but Hubzilla refuse for store of css-block. text/plain format is stored, but in the webpage are css formats refused.

zen-template
[template]zen[/template]
[region=htmlhead]
    [block][var=wrap]none[/var]htmlhead-with-css[/block]
[/region]

[region=content
    [block][var=wrap]none[/var]my content[/block]
[/region]

I implement succesfull as test my css-solution here https://dev.hubzilla.org/page/flegno/css-test with Hubzilla-Version 2.3.4. But I want know: Exist in the Hubzilla Version 2.2 a bug for store in https://hub.libranet.de/blocks/hucope ?

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