ebay.com should be considered a “Domain” so as long as you’ve not customised the configuration for your entry (or all entries) there should be no difference in behaviour between the pages. Check that you have the entry’s minimum match URL set to “Domain”.
If that’s already configured, you may be having a problem due to something blocking KeePassRPC from downloading the latest list of domains - see Problems when KeePass can’t determine a domain name using the PSL