TYPO3 Core

Given the "Languages" view is used in the Page module with mod.web_layout.defLangBinding enabled, when reordering content elements in a custom section (colPos > 0) via drag and drop, invalid values for colPos and sys_language_uid are sent to the backend and eventually the DataHandler:

cmd[tt_content][13][move]: -10
data[tt_content][13][colPos]: false
data[tt_content][13][sys_language_uid]: NaN

Here 13 is the UID of the dragged content element and 10 is the UID of the content element after which the dragged element should be sorted.

This affects sorting to positions anywhere else but the beginning of the section. The "Columns" view is fine however.

This make it impossible to move the record:

2: SQL error: 'Incorrect integer value: 'false' for column 'colPos' at row 1' (tt_content:13)

This can be observed in TYPO3v8 and TYPO3v9. Probably also TYPO3v10 with the classic Page module but this cannot be checked ATM due to #90617.