Collocation problem with multitempotal data

Hello everyone!
I tried to create a multi-temporal layer stack from Sentinel-2 data.

For images that were created using the bandMath function (new Image containing only one band) it works really well. However, when I try the same for images with more than one band (e.g. LAI, fAPAR) it doesn’t work.
The resulting scenes look something like this:

Does someone have suggestions for this issue?

Thanks in advance