Thanks for your help sincerely! @grigaswp
I access to the themes page of Appearance,then use live preview function of the default theme Twenty Twenty-one,and there is nothing wrong on product page,the issue doesn’t persist.
Now i going to report this to the theme author and looking for support.
Thank you for your professional advice and help,best wishes! @abwaita @grigaswp
Thank you for your reply @abwaita .
I have not modified or overriden the single-product.php file,neither all the source files of woocommerce.And the plugin version is 5.5.1.
I just worry about switching theme may cause some unexpected issues when switching back,are there any other suggestions or ways to locate errors?
Thanks again for your help.
