WD Photos can only be connected manually

I noticed a lot of extra and old iOS devices linked to My Book Live so I removed all of them and tried to set up my iPhone and iPad again. The WD My Cloud app linked by entering my user password, but WD Photos would not link that way. It kept complaining it couldn’t connect. The only way to link WD Photos was using the manual code. That was both on my iPhone and iPad.

Is the link still active the devices were manually added? Or do you need to constantly link your devices to WD Photos?