Reproduce #5271 issue in 2.16

src/test/java/com/fasterxml/jackson/databind/deser/enums/EnumDeserializer5271Test.java

@@ -0,0 +1,43 @@
+package com.fasterxml.jackson.databind.deser.enums;
+
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.json.JsonMapper;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+public class EnumDeserializer5271Test
+{
+    public enum MyEnum {
+        T10("10%"), T20("20%"), T30("30%");
+
+        private final String code;
+
+        MyEnum(String code) {
+            this.code = code;
+        }
+
+        @JsonValue
+        public String getCode() {
+            return code;
+        }
+    }
+
+    @Test
+    void convertStringToEnum() {
+        _testConvert(JsonMapper.builder().disable(DeserializationFeature.READ_ENUMS_USING_TO_STRING)
+                        .build()
+        );
+        _testConvert(JsonMapper.builder().enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING)
+                .build()
+        );
+    }
+
+    private void _testConvert(JsonMapper mapper) {
+        assertThat(mapper.convertValue("10%", MyEnum.class))
+                .isEqualTo(MyEnum.T10);
+    }
+
+}

src/test/java/com/fasterxml/jackson/databind/ser/EnumAsMapKeyTest.java

@@ -130,6 +130,8 @@ public void testCustomEnumMapKeySerializer() throws Exception {
     public void testJsonValueForEnumMapKey() throws Exception {
         assertEquals(a2q("{'stuff':{'longValue':'foo'}}"),
                 MAPPER.writeValueAsString(new MyStuff594("foo")));
+        MyStuff594 ff = MAPPER.readValue(a2q("{'stuff':{'longValue':'foo'}}"), MyStuff594.class);
+        System.out.println();
     }
 
     // [databind#2129]