Try the uploaded .odt file. I opened your file with AOO and it opened OK, so I saved it as a .odt file. The file was probably created in LibreOffice, but AOO either seems to have a better error handling mechanism than LO, and copes with the error(s); or does not recognise the LO tags and therefore ignores them.
I have also uploaded a .docx file where I manually removed the repeated tags. It may be better, but it probably has lots of extra spaces and tabs added as part of the repair process.
You need to report this is a bug with LibreOffice as, until it is fixed, it will continue to happen. See
How to Report Bugs in LibreOfficeIf this solves the problem, please click the Edit button on your
original post and add [Solved] in front of your subject.