Solution : https://service.sap.com/sap/support/notes/1624733 (SAP Service marketplace login required)
Key words :
flexible ui designer, wd component fpm_tree_uibb, selection button, added entries, longer displayed, terms fluid, configuration reason, program error, problem occurs, implement note 1615735
Related Notes :
1625213 | SAP TM 8.1-Collection of Notes recommended to be implemented |