fiori login page image for Mobile and Mobile Land seems not working.
We created a custom background image for fiori login page. It works properly for desktop setting but it doesn't for Mobile and Mobile Land.
We changed on Ushell service on SICF, login class /UI2/CL_SRA_LOGIN to customer one and then redefined INIT_DEFAULT_PROPERTIES with customer images. So, img_background is working fine but system seems not able to get img_background_mobile and img_background_mobile_land.
Actually, looking a bit closer to standard images, it looks like it doesn't show standard images either. That's why we tried to delete customer implementation just to check if our code was the issue, but it looks like it's not.
Did you ever face this issue? Is there any note to implement (which I cannot find)?
System Componet SAP_UI is 740 sp16
Thanks in advance,