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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Incorrect loading of ODF file"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=38484#c12">Comment # 12</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Incorrect loading of ODF file"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=38484">bug 38484</a>
              from <span class="vcard"><a class="email" href="mailto:franklin@goodhorse.idv.tw" title="Franklin Weng <franklin@goodhorse.idv.tw>"> <span class="fn">Franklin Weng</span></a>
</span></b>
        <pre>
Still reproducible in 

版本:6.3.3.2
組建 ID:a64200df03143b798afd1ec74a12ab50359878ed
CPU 執行緒:4; OS:Linux 5.2; UI 算繪:預設; VCL: kde5; 
語言地區:zh-TW (zh_TW.UTF-8); UI語言:zh-TW
Calc: threaded

I noticed that even I enabled the header, added something in the middle block
and removed another 2 blocks, and saved with this version, the style:header
attribute became

<style:header><text:p>Book1 <text:date style:data-style-name="N2"
text:date-value="2019-11-23">0000/00/00</text:date></text:p></style:header><style:header-left
style:display="false"/>

No style:display="true" either.</pre>
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