Merchant search boxes are specific to each merchant MTX

Normal behaviour: I visit the merchant in someone else's HO and enter something in the search box to filter the items in the shop. Then I visit another HO and the search box contains what I previously entered in the last HO.

Actual behaviour: I visit the merchant in someone's HO that only has Faustus placed and enter something in the search box. Then I visit another HO that is using either Man in the Box or Salar, Merchant Djinn MTX, and the search box is empty. If I visit another HO with Faustus, the search again contains what I entered first. And if I search for something in either Salar or Man in the Box, that search term only reappears in other HOs using that particular MTX.

This can cause confusion especially if you've entered different search terms in all three merchants, it many not be immediately clear that you've gone back to a HO where it's still using an older search. This is particularly annoying with long map regex searches that are longer than the search box can display and are difficult to parse/manually check that they're correct.