--- feeds.php   2022-01-26 09:49:24.721006194 +0100
+++ feeds_mod.php       2022-01-26 09:50:12.997754011 +0100
@@ -195,7 +195,11 @@
                                // frontend doesn't expect pdo returning booleans as strings on mysql
                                if (Config::get(Config::DB_TYPE) == "mysql") {
                                        foreach (["unread", "marked", "published"] as $k) {
-                                               $line[$k] = $line[$k] === "1";
+                                                if (is_integer($line[$k])) {
+                                                   $line[$k] = $line[$k] === 1;
+                                                } else {
+                                                   $line[$k] = $line[$k] === "1";
+                                                }
                                        }
                                }