Alert Log Filter Expression Editable when view-mode in Monitoring Template of OEM 13.2

OMS 13.2.0.0.171017
DB Plug-in 13.2.2.0.170930
EM Agent 13.2.0.0.170930

A customer asked for helping to apply patch 24334660 on the Enterprise Manager 13.2. Before starting patching, check the Oracle Home patching level as following,

[oracle@oms1]$ /u01/app/oracle/product/em/middleware/OPatch/opatch lsinventory
Oracle Interim Patch Installer version 13.9.1.3.0
Copyright (c) 2017, Oracle Corporation.  All rights reserved.


Oracle Home       : /u01/app/oracle/product/em/middleware
Central Inventory : /u01/app/oracle/oraInventory
   from           : /u01/app/oracle/product/em/middleware/oraInst.loc
OPatch version    : 13.9.1.3.0
OUI version       : 13.9.1.0.0
OUI location      : /u01/app/oracle/product/em/middleware/oui
Log file location : /u01/app/oracle/product/em/middleware/cfgtoollogs/opatch/opatch2017-10-28_10-43-03AM_1.log


OPatch detects the Middleware Home as "/u01/app/oracle/product/em/middleware"

<<Output truncated>>

Patch  26625183     : applied on Fri Oct 20 16:32:23 EDT 2017
Unique Patch ID:  21574333
Patch description:  "EMBP Patch Set Update 13.2.0.0.171017"
   Created on 8 Oct 2017, 20:17:42 hrs PST8PDT
   Bugs fixed:
     26782785, 25341210, 26090681, 26680573, 25110496, 24953203, 24459731
     26364865, 25861385, 26027847, 26542313, 20511097, 25967196, 25230688
     24701883, 25326446, 25217253, 25534065, 23506806, 25244726, 25179524
     25136456, 22143858, 25354849, 25615522, 25674055, 25219896, 25255429
     23251874, 24334660, 24944461, 23743109, 24426862, 25701178, 25268183
     23549064, 25506784, 25497731, 25497622, 24789016, 24742172, 25355038
     25163555, 25044101, 24608207, 23619694, 24753427, 24734911, 23705752
     24917276, 24614251, 22901546, 23196054, 21470098

<<Output truncated>>

Apparently, the OMS home has been applied PSU 13.2.0.0.171017, which already included the fix of the bug. Customer performs following steps to reproduce his issue,

In Monitoring Templates window, click the name of desired template and get into template details window, then click the Glasses icon in 'Edit' column besides metric 'Generic Alert Log Error'. In the new windows, the 'Alert Log Filter Expression' can be changed, but the new value cannot be saved (retained) after click OK. The value goes back to old value when come into this window again. It seems a bug/defect here. Actually, the window is a view-mode (read only) window with title 'View Advanced Settings: Generic Alert Log Error'. Yes, it gives you opportunity to type words in view-mode window, but does not change anything, a funny behaviour.

It is not a correct way to edit a metric in a monitoring template by clicking the template name. Instead, select the record (row) of the template and click 'Edit' button. In 'Edit Monitoring Template' window, the metric can be changed permanently.