hmm, this is not solved.
Does this plugin have a maximum number of sources?
Thank you for your reply.
As a result of the investigation, there were no problems with the feed itself, but I will paste some of them below.
https://hosyusokuhou.jp/feed
https://worldtriggermatome.ldblog.jp/index.rdf
http://gunpla-news24.info/feed
etc…
Since then, I tried re-registering one old site and it was automatically updated, but the maximum number of sites that can be automatically updated has not changed, and the oldest site that was previously updated is no longer automatically updated.
In short, if you re-register 5 items, the 5 re-registered items will start to be automatically updated, but the 5 most recently registered items that were previously automatically updated will no longer be automatically updated.
It feels like the maximum number of automatic updates is limited.
