muy mala calidad al exportar fotos a baja resolución

[Abtrix]

Buen día he notado que con la nueva version de ligthroom al exportar fotos en formato JPG con una resolucion de 480x654 con peso maximo de 38k, estas se ven siuper pixceleada, he tenido que cajar la versión 10.4 en esta version no tiene problema y exporta con muy buena calidad, alguen puede ayudarme saber a que se debe, o que estoy haciendo mal? lo he piorbado en MAC y Windows y es el mismo caso. 

[dj_paige]

When you export, what software do you use to view the exported photo? What magnification is being used in the software?

Show us a screen capture of the exported image, which you don't like. Use the "Insert Photos" icon to include your screen capture in your reply. Do NOT attach files.

[Per Berntsen]

Good day I have noticed that with the new version of ligthroom when exporting photos in JPG format with a resolution of 480x654 with a maximum weight of 38k, these look super pixceled, I have had to box version 10.4 in this version it has no problem and exports with very good quality, someone can help me know what it is due to, or what am I doing wrong? I have piorbbado it on MAC and Windows and it is the same case. 

By @Abtrix

Better yet, post the exported 480 x 654 image itself.

Also please post a screenshot of the Export dialog with the settings you used. Make sure that File setting and Image sizing are visible and expanded.