Directory with specific persistent SELinux security context keeps getting relabeled to default_t on reboot

Issue

A custom directory under the root filesystem, say '/example/', is required to have the SELinux security context type 'home_root_t'. For persistence of the security context, an SELinux policy module containing the file context rule is loaded on the system, with the entry given below.

/example                         system_u:object_r:home_root_t:s0

When the 'restorecon' command is run on the directory, the SELinux security context is set correctly, as expected.

However after every reboot, the directory is being relabeled as 'default_t'.