Saxon

I am creating XsltCompiler from the Processor and using it only one time to compile my XSLT file as follows

        XsltCompiler xsltCompiler = processor.newXsltCompiler();
        xsltCompiler.setURIResolver(uriResolver);
        XsltExecutable executable = xsltCompiler.compile(uriResolver.resolve(docid, null));

But sometimes it is throwing ConcurrentModificationException. Full stacktrace is given below

Caused by: java.util.ConcurrentModificationException: null
	at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1043)
	at java.base/java.util.ArrayList$Itr.next(ArrayList.java:997)
	at net.sf.saxon.type.TypeHierarchy.toSet(TypeHierarchy.java:582)
	at net.sf.saxon.type.TypeHierarchy.computeRelationship(TypeHierarchy.java:383)
	at net.sf.saxon.type.TypeHierarchy.relationship(TypeHierarchy.java:306)
	at net.sf.saxon.expr.parser.TypeChecker.staticTypeCheck(TypeChecker.java:121)
	at net.sf.saxon.expr.FunctionCall.checkFunctionCall(FunctionCall.java:221)
	at net.sf.saxon.expr.SystemFunctionCall.typeCheck(SystemFunctionCall.java:83)
	at net.sf.saxon.expr.Operand.typeCheck(Operand.java:185)
	at net.sf.saxon.expr.Expression.typeCheckChildren(Expression.java:428)
	at net.sf.saxon.expr.SystemFunctionCall.typeCheck(SystemFunctionCall.java:82)
	at net.sf.saxon.style.StyleElement.typeCheck(StyleElement.java:1543)
	at net.sf.saxon.style.XSLForEach.validate(XSLForEach.java:110)
	at net.sf.saxon.style.StyleElement.validateSubtree(StyleElement.java:1732)
	at net.sf.saxon.style.StyleElement.validateChildren(StyleElement.java:1767)
	at net.sf.saxon.style.StyleElement.validateSubtree(StyleElement.java:1736)
	at net.sf.saxon.style.PrincipalStylesheetModule.preprocess(PrincipalStylesheetModule.java:413)
	at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:220)
	at net.sf.saxon.style.StylesheetModule.loadStylesheet(StylesheetModule.java:260)
	at net.sf.saxon.style.Compilation.compileSingletonPackage(Compilation.java:101)
	at net.sf.saxon.s9api.XsltCompiler.compile(XsltCompiler.java:813)

I am using saxon-ee-9.7.0.4