SOLVED External RSS Feeds on WordPress show weird characters

I migrated a greek WordPress site(using utf-8) from my Siteworx panel to my newly installed cPanel. After the migration completed I noticed that some of the external RSS feeds which were loaded to the site page through the default WordPress RSS widget show some weird characters.
I'm attaching two screenshots; first one is showing how the rss feed looked when the site was hosted under Siteworx while the second one shows the how the external feed shows under cPanel.

How the feeds used to show:


How they are showing after moving to the cPanel setup:

Code:

/etc/redhat-release:CloudLinux release 7.3 (Yury Malyshev)
/usr/local/cpanel/version:11.64.0.36
/var/cpanel/envtype:standard
CPANEL=release
Cloudlinux
Litespeed

 

Thanks a lot for your reply Michael.
I've corrected this issue by re-importing my wp_options table from the old server backup.