Crafting UI Search Delay/Freeze (5.1)

Date & Time: Began as of 10:00 GMT, 2019-10-29 (Patch 5.1 release).
Frequency: Ongoing/constant, no change in severity during the day or evening.
World name: Phoenix - Light
Character name: Cerih Gealai
Class/Level: All crafter classes, levels 66+
Area and coordinates: All (primarily tested in Ward 20 open and alone within FC housing instance, Limsa Upper Deck, Azim Steppes) with no noticeable change from high/low pop areas, or new/existing areas.
Steps:
1. Either paste or type item into the Search box of the Crafting UI
2. Hit Search button or Enter on keyboard.
3. Search will complete, but with exceptional delay (no lag on client itself, only within the crafting pane).
4. Intermittently, search will then refuse to show the new results and will 'snap' onto a prior search result without interaction to click that, but display results of the new search quickly on clicking that one (no new search run). This normally only after the pane freezes noticeably for a few seconds during the initial search.

Other notes:

• Re-running a previous search (either manually as above or by clicking on the history list within the UI pane) will also get the same issue as a new search, so my initial presumption that it just had to load the new/changed recipes once was found false.

• I am assuming this is due to the new Recipe Tree increasing load times on the crafting UI in general, but even in zones where I am alone it can become exceptionally sluggish. Searching from the Tree itself via right-click also produces similar latency within the UI, but not as severe and within acceptable deviations from pre-patch timings to allow for patch day resource-load.

• While the window is 'lagged out', other functions can still work as normal with no delay (chatting, interacting with market board, etc.) so game client main is not affected, and taking or not taking actions outside the crafting pane whilst the search runs does not seem to increase/reduce the duration of the delay, or the chance of a glitchy freeze or snap to wrong search in history.