[Smush Pro] Smush Image Resize Settings Not Working

For image Resizing, we set Smush to Resize our full size images. We used to use tinypng to resize images to be 1920px wide, so even vertical images would be 1920px wide at the most.
In Smush it takes the max width field and is ignoring the max height, so it is resizing my tall images to be max of 1920px tall not wide. Using a 4000 x 6000 px image set to 1920×2880 it resizes pics to 1280 by 1920 pixels when uploading to the media library.
The original is 4000×6000, horizontal images are 6000×4000 which = 1920×1280 when resized so the vert version we want to be be 1920×2880.
We have checked for permissions issues, server errors, enabled wp-debug and aren’t receiving any errors upon upload. This is happening with every site that we try and would like to know if there are known bugs, issues, or limitations to the plugin that would cause this behavior.
Thanks