Blender texture issue

I was trying to make a treasure chest meshes on blender and planned to use it in Roblox

However,when I finish painting the texture uv map,I found that the meshes has weird line on some face

As you can see in the image,there wasn’t any blue lines on the uv map,but appears on the model preview

When I rotate it,the weird blue line still appear but doesn’t appear on uv map tab

Do anyone know how to solve this? Thank you.