A quick bug report: 1) when I include a document into another document, upon loading it takes the branch colours of the latter (slave) document, not of the master.
2) every time I edit the preamble and apply the change, it does a conversion of the whole document which reports the flex inset URL as undefined. Multiple times, as I have many such insets. V. 2.1.4 on Ubuntu 16.04 (but has been around longer) Martin