As you can see from the screenshot below I have an issue with the Gmail App (Android), introducing thin lines between images that are on different rows.

Gmail Image Issue

This is a bit of a nightmare as the client is planning on slicing images so they can have a CTA (appear to be) sitting on top of their chosen images.

Whilst it might not be particularly noticeable in this instance, if the client uses images with a lighter background, then the lines will be more prominent so this needs to be fixed.

Specifically, I picked this issue up on an LG G4 running the latest version of Android. This is the only place I've seen this occurring - Gmail App on iPhone doesn't show the issue and Gmail on desktop is also fine.

Appreciate any assistance.