further looking at my saved searches shows that any that have no terms to search for, just a category to look in, no longer function on a browser.
the same searches from the same account in the eBay app still work just fine.
i'll just add that i would in no way entertain buying a boat from eBay, but there is a prolific scammer who pops up regularly trying to flog a boat (amongst many other high value items) at about half market value using hacked accounts, and i do delight in reporting him/her for fraudulent listings.
you can always spot the ad, two pics on listing, first pic being the same GRP boat, second being text telling you to contact a gmail account and not bid on the listing.