The completion cannot be triggered at the end of XmlAttributeValue.

When I use CompletionContributor to implement an XML attribute completion similar to the HTML class attribute, the consecutive completions are triggered normally after I trigger one completion.

 However, when I return to the end of this attribute from elsewhere and input characters, the completions cannot be popped up normally. 

The following is the code

private val INSTANCE = AddSpaceInsertHandler(true)
class XmlTagAttributeCompletionContributor: CompletionContributor() {
    override fun fillCompletionVariants(parameters: CompletionParameters, result: CompletionResultSet) {
        if(parameters.completionType != CompletionType.BASIC) {
            return
        }
        // attribute value
        val position = parameters.originalPosition ?: return
        val context = position.context
        if(context == null || context !is XmlAttributeValue){
            return
        }
        // attribute
        val attribute = context.parentOfType<XmlAttribute>() ?: return
        val attributeName = attribute.name
        // tag
        val tag = attribute.parentOfType<XmlTag>() ?: return
        val tagName = tag.name
        if(shouldAddElement(tagName,attributeName)){
            val offset = parameters.offset
            val map = getPresetAttributeValues(tagName, attributeName,context,offset) ?: return
            result.addAllElements(
               map.map{
                   PrioritizedLookupElement.withPriority(
                       LookupElementBuilder.create(it.key)
                           .withCaseSensitivity(false)
                           .withInsertHandler(INSTANCE)
                           .withTypeText(it.value),
                       Double.MAX_VALUE
                   )
               }
            )
        }
    }
}