This may be a twofold problem.
First, it may be your WordPress settings.
If you don't use SEO plug-ins, please check the settings of the TD k of the page or article or site first. I mean, in the page source code, make sure that these settings are the same as you expected.
And if you use seo plug-ins, you must confirm the settings of TD k again. Because once the current mainstream wp seo plug-in is enabled, it will lead to the loss or change of the title, description and keywords in the website industry. This must be paid attention to when using plug-ins.
If you can absolutely determine the settings of t DK in your page source code, consider step 2.
Second, choose online complaint snapshot.
You mentioned many complaints, but they haven't changed yet. You can manually and statically write a page to force the PK manually to complain about Baidu snapshots again, and check whether Baidu snapshots will be updated, so you can determine whether Baidu spiders recognize that your source code has changed when they crawl your website.
