"No search results" message is displayed on the Metadata input screen of submission Step3

Dear all,

Every time I enter a keyword and subject etc. on the metadata input screen of submission step 3, the message of “No search results.” is displayed at the bottom left of the screen.
Please refer to the attached image below.
NoSearchResult

What is this result of the search? Is it searching for registered keywords, subject etc.?
I would like to hide it if possible, but please tell me how to do it.

I am using with OPS 3.3.0.8.
I’m sorry if it has already been resolved. If so, please let me know the solution.

Thanks in advance,