3.7.1 / 3.72 -> h1 + p { text-indent: 0} ignored

[Terisa]

Bug Checklist

These items are mandatory. If you need help finding this information submit the
bug report with as much completed as you can and ask for help finding the rest.

• I am using the latest version of calibre to report this bug, which is: 7.23
• I am using an official calibre release, not one from a third party
• I am using the latest version of this plugin, which is: 3.7.2
• My operating system is Windows 10
• I have included the full, complete, unmodified debug log from calibre (No log in conversion)
  • Directions for getting the debug log are under the "Logs" header below.
• I have translated the text in any screenshots and logs to English, or all (No screenshot)
  screenshots and logs included are in English.

These items are optional. Fill in as much of them as possible. If something is
not applicable to your bug report, note that.

• The path to my calibre library or to a book in my calibre library has
  non-ASCII characters: no
• If I am using Windows 10, I have not enabled Windows' beta support
  for Unicode

Describe the bug

Css for the book includes the following configuration:

h1 + p {
text-indent: 0
}

When the book is sent to the ereader with the Kobo Touch Extended drive, this setting is not honored. If I send the same ebook with the 3.7.0 version of the driver, settings are honored.

Steps to Reproduce

Steps to reproduce the behavior (as detailed as you can):

1.- Include the previous sentence in the css ebook
2.- Convert it on the fly and send it to the ereader through Kobo Touch Extended driver.
3.- Check the ebook in the ereader.

Expected behavior

First paragraph after header 1 is not indented.

Actual behaviour

First paragraph after header 1 is indented.

Additional context

It happens both with versions 3.7.1 and 3.7.2, but not with 3.7.0