Distorted images with Catch Themes tiled mosaic gallery

Hi, My issues are : – the Catch tiled gallery doesn’t display as expected (distorted images) but it displays a good quality carousel. – the Jetpack tiled gallery (as it's said you used this plugin in the demo gallery website) display as expected but it displays a bad quality carousel (not like in your demo, where you say it’s done with Jetpack). Your colleague told me you used Catch Themes gallery plugin in the demo (but it's written you used Jetpack so I don't know the truth lol). Tested with the same compression images, enabled and disabled each one see the difference. Tried to disable the accelerations option on Jetpack settings but doesn’t do anything. How to solve the distortion issue with Catch Themes plugin ? How to solve bad carousel quality with Jetpack gallery plugin ? What are your settings on the demo please ? Ps : I'd prefer to use Jetpack plugin for its flexibility to be honest.