Buying trinket bug [GAMEPLAY]

I loaded into a game (custom luckily) and was rather precise in my clicks to buy items quickly, however I noticed that in my speed my trinket was in my inventory and I could buy more of them.

https://i.gyazo.com/9b119bf0929b9dcfe709c19cb66069f6.png

Not sure how else to replicate this as I just got all 4 items with 4 right clicks rather quickly.

Edit: 100% replicatable if you buy items before your character spawns in on the map. Also disables your base button it seems like.