Html comments problem in 2.2.1

Have recently updgraded to version 2.2.1 and in the process of verifying the differneces and problems.
have noticed the following:
have a page template which contains 2 page level item substitutions &PX_ITEM. and &PX_ITEM2. above and below a piece of html
the value of these items is either blank or  respectively thereby allowing the code to be commented out on the fly. This worked in previous version of HTMLDB in APEX 2.2.1 however the chevrons are being output as < and > respectively and so are not being recognised as comment tags.....
any ideas as to why this has changed and how to set it back to working the way it did in previous releases???

Farhan,
If those two items are set to Display As "Hidden", try changing them to
"Display as Text (does not save state)".
More item types, including Hidden items have their contents escaped to remove HTML in version 2.2.

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