Webview Pager

I have a pager with several webviews on iOS, including taboola's ads.

the last webview displayed is working fine, but when going back to previous webview, no actions are fired when clicking the taboola items. The "didClickOnPlacementItem" function is not called as it should be

the delegate (TBLWebPageDelegate) reference seems to be "gone", or it went to the last webview shown. . Anyway, the "previously built" webview has non clickable taboola items

Regards