Complex writer document frozen in LO24.2

I have some complex .odt documents that open without problems in LO but when I try to open them in 24.2 they freeze. It’s a master document with several sections to other .odt that refer to the cells of an .ods with several sheets.
I have had to downgrade to to open them and there are no problems there.

Please note that (1) this is a question and answer site (you didn’t ask any question); (2) this is not a site for bug reporting; and (3) a bug report needs to be reproducible (you never made it clear for others how to see the problem: neither exact steps to create such a file from scratch, nor provided a sample document set).