Linkpicker ok button is enabled on incorrect document.

I have configured xinha internal link picker as per instruction given https://wiki.onehippo.com/display/CMS7/Configure+the+linkpicker+to+select+folders+or+filter+on+document+type

Here is steps to reproduce it.

1) Configure xihna internal link
2) select word in xinha and click internal link
3) select the any non allowed document type in document in picker (Expected OK button should not be enabled)
4) select any allowed document type as configured in step 1 (Expected OK button should be enabled now)
5) Repeat step 3 Now OK button is enabled, even though you have selected wrong document type. (Expected OK should not be enabled now)

If you press OK now, It will create link for last valid selected document.