Datasource-grouping only works for first associated section

[twiro]

I have the following scenario:

• One "Images"-section is used to manage all images of two other sections "Projects" and "News".
• The entries in the "Images"-section are associated to a single entry of on of these two "parent"-sections. I use a (hidden) Association-field called "entry" for that.
• I have a datasource called "images" that pulls all the images for the currently needed entries.
• On specific fronted pages I have to show images for multiple entries, so I want to group the entries in the "images"-datasource by their parent-entry.

This results in the following buggy behavior:

• The image-entries associated to entries of the first parent-section "Projects" show up as expected in the datasource (grouped by parent-entry).
• The image-entries associated to entries of the second parent-section "News" simply disappear.

As soon as I turn off grouping all expected image-entries (of both parent-sections) are included in the datasource again. I also tried switching to a more fancy name than "entry" for the Association-field - doesn't do a difference. I also tested this scenario with Selectbox Link Field - obviously has the same bug.

Setup:

• Symphony 2.6.11
• Selectbox Link Field 2.0.0
• Association Field 2.0.1

[twiro]

Just a reminder – I ran into the exactly same bug in my latest project!

Setup is:

• Symphony 2.7.10
• Association Field 2.1.0