diff --git a/refinery/units/__init__.py b/refinery/units/__init__.py
index fde3cbd2c9..2a2a0e3bdf 100644
--- a/refinery/units/__init__.py
+++ b/refinery/units/__init__.py
@@ -1836,6 +1836,7 @@ def read1(self, bytecount: int = -1) -> bytes:
     def act(self, data: Union[Chunk, ByteStr]) -> Generator[ByteStr, None, None]:
         cls = self.__class__
         iff = self.args.iff
+        lvl = cls.log_level
 
         if iff and not self.handles(data):
             if iff < 2:
@@ -1845,6 +1846,7 @@ def act(self, data: Union[Chunk, ByteStr]) -> Generator[ByteStr, None, None]:
             data = self.args @ data
             data = data
 
+        cls.log_level = lvl
         cls.logger_locked = True
 
         try: