Filtering does not work after drawing annotation

[oncoml]

Hi all, thank you for making and maintaining this awesome library.

I'm combining OpenSeadragonFiltering and an annotation library using Annotorious https://annotorious.github.io/getting-started/osd-plugin/. The filter works well by itself and the annotation works well by itself. Once an annotation is drawn and created, however, the filter stops functioning. Deleting the annotation element does not help.

Annotorious initially creates an layer under the same parent as the filtering canvas. When a new annotation is drawn and created, a layer is created that represents the element that is drawn.

My short-term solution is to copy the viewer into another object and let Filtering apply on it. It is hacky. I'm curious to what is happening. Perhaps it's something simple that I'm missing. Any thoughts?

I will also post the same message to the Annotorious page, just to get more feedback.

Thanks in advance.