Any line that is immediately after a line that contains only a # is lost when reading application properties files

If an application.properties file has the following content:

```
#
property1.name=value1
property2.name=value2
```

The second line (property1.name=value1) is skipped over and not loaded.
It does not seem to matter where in the file this pattern occurs.

This started happening in spring boot 2.4.0. 
Previously in spring boot 2.3.5 it worked properly.
