Lightroom interpolating pixels with Camera DNG Perspective control

I have a recently updated Leica SL2 with the perspective control feature. Enabling this will insert additional data in the DNG file that corrects for both horizontal and vertical tilting.

With the feature enabled, importing the image into Lightroom, it displays the corrected image, and in the "Transform" tool, "Guided" is selected. So, Lightroom takes the data in the DNG and constructs 4 guide lines and then uses those guidelines to rotate the image and crops into the image to display it without borders (equiv to "Constrain Crop"). You can turn off the display of the corrected image by de-activate the "Transform" tool, and the image rotates to its original (fully framed capture). The size of the SL2 sensor is 8368 x 5584.

(1) Where the "Transform" tool is active (as it is on import with a perspective corrected file) Lightroom reports the image size to be 8368 x 5584.

(2) Deactivating the "Transform" tool, unrotates the image, exposes more pixels (that it had cropped with the guided lines). The image size is reported as 8368 x 5584.

If you export the image as a "Full Size" JPEG, both images are 8368 x 5584.

The bug:

In the case of (1), Lightroom must be interpolating pixels and the actual pixel dimensions of the displayed iamge MUST be smaller than 8368 x 5584. Further my "Full Size" JPEG export should result in a JPEG file with smaller dimensions than the full size of the sensor dimensions.

If I take an image (shot before the Perspective Control update) and apply the "Guided" corrections, I see the image rotate and I see Lightroom adjusting the Image size. Setting "Constain Crop" I lose the white borders and see a cropped, smaller image, as expected.

I can provide the DNG and the exported JPEGs, but wondered if anyone else has seen this problem or has any comments.

William