All my feeds marked invalid on update

I’ve been running pages with news headlines on my blog for the past few years as it lets some people see some news in countries where the source material is blocked. As I periodically do, I went in today to add another feed to the Myanmar news page. When I clicked update it marked all but one of the feeds as being invalid and removed them, leaving just one feed.

It displayed all of the feeds as having bad formatting placing http://%20 in front of the https:// url of each feed where previously there was a comma. I do not know where it is drawing the http://%20 from.

It’s not possible to enter more than one feed.

Until I attempted to add a new feed and clicked the update button everything was working fine. There are similar pages for the other Asean countries. I’m not prepared to touch those in case they do the same thing.

Thank you.

Feedzy V 4.3.2
WP version 6.4.1
The site uses Litespeed cache and Cloudflare.

The page I need help with: [log in to see the link]