How do I fix this "use item" feature?

I am making a point-and-click style adventure game where the player can put items in their inventory, and then double-click on those items in order to use them. It does this by changing the mouse style to match the sprite of whatever item they clicked on. However, as the scale of my game has increased, a delay has grown between double-clicking the item and the mouse sprite changing.

Right now, it there is a full two second delay, which is not only noticeable, but is also causing bugs. But, weirdly, after the first time an item has been used, the next time the player uses that item, the mouse sprite changes immediately. With this in mind, I tried creating a function that looped through every item sprite at the start of the game, and set the mouse sprite to each object. While this loop has gotten rid of the delay, there are now two new problems: one, there is a brief moment at the start of the game where the mouse cursor somewhat noticeably flickers between all the items, and two, there is a low chance that, after the mouse has looped through all the item sprites, the mouse sprite doesn't return to the regular mouse cursor sprite.

All this to say, is there a simpler way for me to fix this delay problem that doesn't result in more issues? I appreciate any help.

Link to video showing gameplay without the mouse sprite loop.

youtu.be/_iLWGeGyhMo

Link to video showing gameplay with mouse sprite loop working "properly".

youtu.be/9hfSWYfX0Uw

All items that can be picked up by the player are a part of the "InvItems" family.

Image of the code used for the mouse sprite loop. I am aware that it is extremely brute force-y. I originally just had a single for-each member of the InvItems family loop, but I was experiencing the previously mentioned issue (where the mouse sprite would not return to the regular cursor sprite) much more compared to after I changed it to the code pictured.

If you need any more information, feel free to let me know!

Image of the alternative cursor sprite loop using a single for-each loop.

While using this method though, the calls to "Set cursor from sprite CursorArt" are almost always ignored, resulting in the player's cursor looking like a screwdriver or lump of coal (at least until they try using an item, in which case the cursor sprites function properly)

Thank you for the suggestions! The original sprite is 50x50, though I resized them in-game to 100x100. They are already in the game, just outside the layout, though I can't delete them as they are needed for code later in the game. I'll try doing the single object with all sprites thing though.

I tried doing what you suggested (using a single object that changes animations), but even though they are all on the same object, it still takes close to 2 seconds when trying to use a new item.

Thank you for the help. Worker is already disabled, and I tried making the sprite smaller, and while it did seem like it made the delay shorter, it's still too large a gap. I could try making it even smaller, but it's getting to the point were any smaller and it would be hard to tell what you're looking at. I'll keep futzing with it to see if I can get it faster, but if not, I'll stick to the sprite loop.