Abbreviated comparison with Map fails in executable-model

import java.util.Map;
rule R1 when
    Map(this['money'] >= 65 && <= 75)
then
end

[ERROR] testMapAbbreviatedComparison[FLOW_DSL](org.drools.modelcompiler.CompilerTest)  Time elapsed: 0.258 s  <<< ERROR!
java.lang.UnsupportedOperationException: Unknown expression: this["money"]
	at org.drools.modelcompiler.builder.generator.expressiontyper.ExpressionTyper.findLeftLeafOfNameExpr(ExpressionTyper.java:875)
	at org.drools.modelcompiler.builder.generator.expressiontyper.ExpressionTyper.findLeftLeafOfNameExpr(ExpressionTyper.java:867)
	at org.drools.modelcompiler.builder.generator.expressiontyper.ExpressionTyper.findLeftLeafOfNameExpr(ExpressionTyper.java:867)
	at org.drools.modelcompiler.builder.generator.DrlxParseUtil.trasformHalfBinaryToBinary(DrlxParseUtil.java:331)
	at org.drools.modelcompiler.builder.generator.expressiontyper.ExpressionTyper.toTypedExpressionRec(ExpressionTyper.java:170)
	at org.drools.modelcompiler.builder.generator.expressiontyper.ExpressionTyper.toTypedExpression(ExpressionTyper.java:118)
	at org.drools.modelcompiler.builder.generator.drlxparse.ConstraintParser.parseBinaryExpr(ConstraintParser.java:309)
	at org.drools.modelcompiler.builder.generator.drlxparse.ConstraintParser.getDrlxParseResult(ConstraintParser.java:114)
	at org.drools.modelcompiler.builder.generator.drlxparse.ConstraintParser.drlxParse(ConstraintParser.java:81)
	at org.drools.modelcompiler.builder.generator.visitor.pattern.PatternDSL.findAllConstraint(PatternDSL.java:124)
	at org.drools.modelcompiler.builder.generator.visitor.pattern.PatternDSL.buildPattern(PatternDSL.java:191)
	at org.drools.modelcompiler.builder.generator.visitor.ModelGeneratorVisitor.visit(ModelGeneratorVisitor.java:128)
	at org.drools.compiler.lang.descr.PatternDescr.accept(PatternDescr.java:267)