2 files changed, 16 insertions, 6 deletions
diff --git a/lib/private/Files/Cache/Cache.php b/lib/private/Files/Cache/Cache.php
index afa464a8138..77ef61b2449 100644
--- a/lib/private/Files/Cache/Cache.php
+++ b/lib/private/Files/Cache/Cache.php
@@ -954,9 +954,11 @@ class Cache implements ICache {
 				$unencryptedTotal = 0;
 				$unencryptedMax = 0;
 			}
-			if ($entry['size'] !== $totalSize) {
-				// only set unencrypted size for a folder if any child entries have it set, or the folder is empty
-				if ($unencryptedMax > 0 || $totalSize === 0) {
+
+			// only set unencrypted size for a folder if any child entries have it set, or the folder is empty
+			$shouldWriteUnEncryptedSize = $unencryptedMax > 0 || $totalSize === 0;
+			if ($entry['size'] !== $totalSize || ($entry['unencrypted_size'] !== $unencryptedTotal && $shouldWriteUnEncryptedSize)) {
+				if ($shouldWriteUnEncryptedSize) {
 					$this->update($id, [
 						'size' => $totalSize,
 						'unencrypted_size' => $unencryptedTotal,
diff --git a/lib/private/Files/Cache/Scanner.php b/lib/private/Files/Cache/Scanner.php
index f7d1d105d83..801c5239754 100644
--- a/lib/private/Files/Cache/Scanner.php
+++ b/lib/private/Files/Cache/Scanner.php
@@ -36,6 +36,7 @@
 namespace OC\Files\Cache;
 
 use Doctrine\DBAL\Exception;
+use OC\Files\Storage\Wrapper\Encryption;
 use OCP\Files\Cache\IScanner;
 use OCP\Files\ForbiddenException;
 use OCP\Files\Storage\IReliableEtagStorage;
@@ -219,7 +220,7 @@ class Scanner extends BasicEmitter implements IScanner {
 						$newData['parent'] = $parentId;
 						$data['fileid'] = $this->addToCache($file, $newData, $fileId);
 					}
-					
+
 					$data['oldSize'] = ($cacheData && isset($cacheData['size'])) ? $cacheData['size'] : 0;
 
 					if ($cacheData && isset($cacheData['encrypted'])) {
@@ -390,8 +391,15 @@ class Scanner extends BasicEmitter implements IScanner {
 			}
 		}
 		$oldSize = $data['size'] ?? null;
-		if ($this->cacheActive && $oldSize !== $size) {
-			$this->cache->update($folderId, ['size' => $size]);
+
+		// for encrypted storages, we trigger a regular folder size calculation instead of using the calculated size
+		// to make sure we also updated the unencrypted-size where applicable
+		if ($this->storage->instanceOfStorage(Encryption::class)) {
+			$this->cache->calculateFolderSize($path);
+		} else {
+			if ($this->cacheActive && $oldSize !== $size) {
+				$this->cache->update($folderId, ['size' => $size]);
+			}
 		}
 		$this->emit('\OC\Files\Cache\Scanner', 'postScanFolder', [$path, $this->storageId]);
 		return $size;