Does not update "Remaining stock" value

[notbike]

Describe the bug

• plugin does not update the "remaining stock" value on the dynmap when a player restocks by dropping items into the chest.

Note: that when a player drops items into a QS chest, the "Selling" value on the QS sign changes within 2 seconds.

To Reproduce
Steps to reproduce the behavior:

- create a quickshop
- open dynmap
- click on QS chest on the map
- alt+tab to in-game and restock
- alt+tab back to dynmap
- refresh webpage
- click on QS chest on the map
- and disappoints

Expected behavior

When a player restocks QS chest, the 'Remaining stock' value should also be updated within 10 to 20 seconds.

Paste link:
https://paste.enginehub.org/5HinwR2L7

Additional context

6 common plugins in the server, they are listed in the link above.
quickshop 4.0.3.2
MC 1.16.1

cleared browser cache.

good job on the last fix. it was awesome, thank you for your work!

[Bloodlex]

Remaining stock is also always 0 on map for me, regardless of restocking and even if items are there:
Paper-384 (MC 1.15.2)
Dynmap version: core=3.1-beta-3-406, plugin=3.1-beta-3-406
QuickShop: 4.0.4.8
QuickShop-Dynmap: 1.0.3