Unable to Perform Search in Pages

Hi

I was able to perform search functions on one of my documents in Pages. But lately (and I observed it is after the pushed update) I can't anymore. It always not returning any result.

So what I did is to create a new document, test something, do a search (perfectly), return to my original document, do a search, not able to, close the file, reopen, do a search, if still cannot, then shut down, start the Mac, try the search and it works. The above steps are all various combinations I tried every day. Some days lucky and some days unlucky.

Has anyone faced the same issue after the Mac Pages updates?