Sometime you might face image quality problem in trip gallery and thumbnail. Gallery images and thumbnails might appear blur and pixelated in your trips. If this is the case you can define the minimum size of the thumbnail as 600×600 px or try increasing the dimensions ( width and height ) of your thumbnail size by going to Admin Panel > Setting > Media.
After doing this regenerate your thumbnail after changing the image size by using the regenerate thumbnails plugin for the best result.
Note: Even if these steps does not solve the issue then please contact to our official support forum for further help.