I believe perhaps the addon(s) Master Merchant, or AwesomeGuildStore, may have a fault in the searching of Guild Traders that results in excessive spam of a single message for every 100 items searched. The message reads: Could not get item link for ZO_TradingHouseBrowseItemsRightPaneSearchResultsContents .
I found a post on this forum from a few years ago with a similar looking message:
https://cdn.esoui.com/forums/showthread.php?t=6408
Which leads me to believe it may be MM or AGS(perhaps another one).
This is a not game-breaking problem, because other than this the game seems to run just fine. Although, it is quite frustrating and annoying to have to spend literally 20+ seconds just scrolling up through all of this mess with the scroll wheel when trying to verify if I have bought a certain item when searching for motifs, furnishing designs and recipes.