Should a ColdFusion/CFML object change (by reference) when being passed as an argument/attribute collection parameter?

attributesTest.cfm

<cfparam name="attributes.var1" default="value1">
<cfparam name="attributes.var2" default="value2">

customtag_attributecollection_test.cfm

<!--- 20221020 Should a ColdFusion/CFML object change (by reference) when being passed as an argument/attribute collection parameter?
  Using CF20201, it's inconsistent and changes w/customtag + attributecollection, but not with function + argumentcollection.
  Twitter: https://twitter.com/gamesover/status/1582874779547095042
  Gist: https://gist.github.com/JamoCA/55db04881d0c6f5aadfcf946625049a2
  Adobe Documentation: https://helpx.adobe.com/coldfusion/developing-applications/building-blocks-of-coldfusion-applications/writing-and-calling-user-defined-functions/working-with-arguments-and-variables-in-functions.html
--->
<cfscript>
void function argumentsTest(var1="value1", var2="value2"){};

payload = ["var0":now()];
argumentsTest(argumentcollection=payload);
writedump(var=payload, label="udf arguments: should only contain 'var0'.");

writeoutput("<br>");

payload = ["var0":now()];
cf_attributesTest(attributecollection=payload);
writedump(var=payload, label="cftag attributes: should only contain 'var0'.");
</cfscript>