Previously annotated objects become invisible on the canvas

[Seungwoo_Nam]

Hi Team,
I am experiencing a critical UI rendering issue in the annotation tool that is severely blocking my workflow.
Issue Summary:
When entering the annotation studio or refreshing the page, some previously annotated objects become invisible on the canvas. However, the data itself is intact.
Detailed Symptoms:
Data is Saved: The missing objects are not lost. If I click on the invisible object’s row in the Layers panel, the object becomes highlighted and visible on the canvas.
Labels Work: Selecting the corresponding label also forces the invisible object to appear.
Random Behavior: The issue is inconsistent. Every time I refresh the page, a different set of objects randomly becomes invisible.
This strongly indicates that the annotations are successfully saved in the backend, but there is a frontend rendering bug or a race condition occurring when the canvas draws the objects during the initial page load.
Impact:
This makes it incredibly difficult to continue ongoing annotation work, as I cannot see the full context of what has already been labeled without manually clicking through every layer.
Could you please look into this urgently? Please let me know if you need specific console logs or network payloads to debug this.