clearing previous structure on applet reload

Hello,

We just upgraded from jchem 5.1 to 5.4.  In the older version, whenever applet reloaded in jsp, the previous drawn structure was cleared.  In the new version, the last structure drawn reappears whenever applet is reloaded.  How do I prevent this behavior?  We seed the applet with a blank mol in the jsp, but still the previous structure appears.  When viewing the html source when the page is loaded, I can see that the mol parameter is indeed blank:

 msketch_param("mol", "");

Thank you for your help!

This is the side effect of legacy_lifecycle.

Set this applet parameter to false to avoid this issue.

msketch_param("legacy_lifecycle",false);

You can read more about it in the documentation: legacy_lifecycle applet parameter.