Feature images dispalyed in Module-MX6 Grid-1 blurred.No Thumb available for MX6

Newspaper v11.2

-1-
Featured images displayed in 265×198 windows of “Module-MX6“ in Grid-1 are not sharp, they’re blurred. The same applies also to “Module-MX6” in Big-Grid-1 added / editted on a different page with tagDiv composer
https://ibb.co/HX8s7hv
(images in example Grid-1 / Big-Grid-1 pixelized due to security; the graphics shows just images locations marked with red frames)

The same source feature image displayed in “Module MX5” in Grid-1 / Big-Grid-1 looks much sharper.

This (blurry images) happens even though applicable 265×198 thumb has been enabled in the theme BLOCK SETTINGS and 265×198 thumb image has been correctly generated for the image.

-2-
Also, no thumb seems to be available in BLOCK SETTINGS for “Module-MX6“. as the mentioned 265×198 thumb is not described as a thumb used for Module-MX6 (on contrary see that for example 534×462 thumb is used for Module-MX5 according to the description).

QUESTIONS:
-I- which thumb is used for Module-MX6 in Grid-1 / Big-Grid-1 if the 265×198 thumb is not ?
-II- which thumb, from the list of all thumbs available, should be enabled in Newspaper theme so that it’s used for generating image for 265×198 Module-MX6 if the 265×198 is not (it’s only for Module-M1 according to the description)?
-III- why the feature pictures in Module-MX6 are blurry and how to fix that?

Thank you

Hi

Unfortunatelly the answer (above) / links don’t provide solution.

We want to use (and have already used) Grid-1 in this part of the website and not use Flexi-Block-X (Flexi-Blocks may be used in different parts of the website), so the links in your answer on configuring Flexi-Blocks or using child theme do not apply here.

The thing is that the 265×198 thumbs for 265×198 windows of “Module-MX6“ in Grid-1 are enabled and are generated by the theme ,
as well as
this is newly reated website (not re-design of an existing content) and content (images and text) are added after (not before) Grid-1 has been chosen (content being added to existing Grid-1 element not the other way around).

So if
– Grid-1 is using 1x MODUKE-MX5 and 4x MODULE-MX6 Blocks,
– MODULE MODULE-MX6 has window size of 265×198 [px]
and
– the applicable thumbs are enabled and are generated by the theme

why the images are blurred?
Why the 265×198 [px] thumbs generated for an image are not used in 265×198 [px] window of “Module-MX6“ of Grid-1?
Why the 265×198 thumb description does not say its used for applicable 265×198 MX6 Block [ while in the same time 534×462 thumb is described as to be used also for corresponding 534×462 MODULE-MX5 in Grid-1 ] ?

QUESTIONS REMAIN:
-I- which thumb is used for Module-MX6 in Grid-1 / Big-Grid-1 if the 265×198 thumb is not ?
-II- which thumb, from the list of all thumbs available, should be enabled in Newspaper theme so that it’s used for generating image for 265×198 Module-MX6 if the 265×198 is not (it’s only for Module-M1 according to the description)?
-III- why the feature pictures in Module-MX6 are blurry and how to fix that?

Regards,