Shop is Currently Busy Every Time Shop is Opened

[brest21]

Plugin Version and Minecraft Version:
Minecraft Paper 1.21 ; iShop 2.26

Describe the Bug, Duplication, or Problem:
'Shop is currently busy, try again soon' appears every time you access a shop using the shop block, regardless if someone else is actually busy.

How To Reproduce:
Create a shop using the shop block; access the shop.

Expected Behavior:
It should only appear if someone else is trying to access it while you're already accessing it.

Screenshots/Error Log:
The player on the left is not accessing the shop; yet the player on the right is. Only the player on the right is inside the shop and performing the actions; and there's no reason for the 'shop is busy' message to appear for the player who is inside the shop. This message appears as soon as you access the shop.

https://imgur.com/SmhrHfv

Additional Context or Information: