Slowness to display the image in ARender

Reproduction steps

1. Create a new Nuxeo document with a standard size image (between 100ko to 5Mo)
2. Click on Annotations View
3. Go back to Nuxeo View
4. Click again on Annotations View

Observed result

2. There are several seconds to wait between the 1st very low rez image and the final display (cf. screenshot)

2. The user can see the final rendering on going from top to bottom of the image

4. Even with the cache, there are several seconds to wait between the 1st very low rez image and the final display ((cf. screenshot)

4. Even with the cache, the user can see the final rendering on going from top to bottom of the image

Expected result

2. The final rendition is displayed almost instantly

4. The final rendition is displayed almost instantly