I noticed one more issue. Maybe its something related to caching? I use lite speed cache plugin.
When I search for any keyword which was not yet searched, site loads but is not redirected to the search page and URL change to this https://www.svgheart.com/?phrase=dragon#
https://prnt.sc/5a6n7EZiAz2W
or
https://www.svgheart.com/product-category/free-svg-files/?phrase=hot#
https://prnt.sc/oFlkaXLb6EO0
here for keyword “double”
https://prnt.sc/I5Sqsn0wyGBI
And when I search one more time for same keyword, page is redirected https://prnt.sc/NvM2_qLEmuPW