Jetpack Tiled Gallery only using full size image when WP Offload Media is on

Hi,
I’ve been running this setup for months (but I don’t update my blog very often) and it’s been going great, my images are on my S3 bucket using Cloudfront CDN.

But lately, I’ve been seeing an issue with Jetpack (Tiled Gallery) + WP Offload Media Lite: The images are always shown as Full size, even when they are supposed to be thumbnail.
I first opened an issue on Jetpack and they told me it should not happen and to try to disable all extension (except Jetpack) and test, which I did.
And, well, I found out that the issue was with WP Offload Media Lite, when it’s on, Jetpack only uses full size images and when it’s off, it uses the different size available.
All thumbnails and smaller sizes are created on the image upload, so the issue isn’t there.

Any idea?

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