Could you Rebuild your Lightroom Preferences(Backup your catalog before Resetting) .Refer Resetting Preferences in Lightroom CC/6 | Lightroom Blog
Once done try that with two different images(with no lens correction applied) and share result with us
Resetting of preferences is not going to help. The photo of the buildings was a Landscape photo in the camera that was rotated in Lightroom to Portrait. It doesn't make any difference if the rotation was automatic or manual. The Gray image was created in another program and was originally Portrait. Lightroom applies the brushes and a few other things on the original Landscape image. Oddly, it doesn't do this with the gradation filter, at least the last time I encountered this "glitch/odd design". There was a LONG thread on this several years ago.
Thanks for the feedback, I'll reset preferences just to confirm. The building shot was actually shot in portrait orientation (just like the gray TIFF file I created in Photoshop) so I'm guessing there's something else going on other than that. Will keep trying things.
I think the problem is RAW files are always Landscape. You may have been holding the camera in Portrait but if you import the photos without automatic rotation the photo will be in Landscape in Lightroom. This is all Lightroom cares about. It doesn't care if you manually rotate it in Lightroom or have Lightroom read the camera rotation data if it is available and automatically rotate it.