Predefined aspect ratio 16:9 is inaccurate

[juhavlintula]

I selected the aspect ratio from the drop-down and swapped the aspect ratio from landscape to portrait. When I tried to convert the image 1440×2560, there was a one pixel error. If I right click the _lzn file and select to convert to 1440×2560 I get 1440×2559 and if I select the Convert from top the screen (Batch convert) I get 1441×2561. I have tried both Ubuntu and Windows version with same results. If I enter the aspect ration manually to the corresponding fields, I get correct result with both conversion methods.

The image IMG_5063.CR2/IMG_5063_9x16_lzn.jpg is in Dropbox (https://www.dropbox.com/sh/q4r3vx3prw2pl4b/AAABn0WNkaakNG9Xs4TTKTVHa?dl=0).