Hello, we have a problem with nested repeater which I believe is a bug:
We use repeaters as a “page builder” on our websites. In some cases we have a repeater block like “Tiles” where we use nested repeaters (4 tiles in a row for example). This problem happens only sometimes and I am not sure how to reproduce it, but once it happens once, it happens all the time and we have not been able to find a fix for it. This is all using Tailor (which otherwise has been fantastic).
- 
Create a nested repeater (tiles block) add items in it and save. This is working as expected. 
- 
When I add more of these blocks and save, the items in nested repeaters are “moved” or transfered to the first created repeater. Once this happens it happens on all entries. 
We tried deleting entries, deleting repeaters, recreating blocks, migrating, redefining Tailor fields, …
Here is simplified definition of the page builder in Tailor:
Builder.yaml
fields:
    Builder:
        label: Builder
        type: mixin
        tab: Content
        source: Mixins/Builder
Mixins/Builder.yaml
fields:
    builder:
        name: Builder
        type: repeater
        displayMode: builder
        groups:
            Tiles:
                name: Tiles
                useTabs: true
                icon: icon-th-large
                fields:
                    content:
                        type: mixin
                        source: Blocks/Tiles
Blocks/Tiles.yaml
fields:
    content:
        type: nestedform
        showPanel: false
        tab: Block
        form:
            tabs:
                fields:
                    tiles:
                        label: Tiles
                        type: repeater
                        displayMode: builder
                        titleFrom: headline
                        tab: Content
                        form:
                            fields:
                                headline:
                                    label: Headline
                                image:
                                    label: Image
                                    type: mediafinder
                                    mode: image
                                    maxItems: 1
Any insight on this would be appreciated!
Thank you!