Wrapping text in new environment does not work in Vintage command mode

[ThSGM]

I use the Vintage mode in Sublime. Wrapping text using C-l C-e only works if, prior to entering the command we enter into 'insert' mode. I made a video to explain the issue:

https://user-images.githubusercontent.com/3396578/137687646-065724fb-b1cf-4eb9-9765-6bd1ca1e4887.mp4

Basically, I would need to go into insert mode, manually select text with the mouse, then hit C-l C-n to wrap.

If I hit C-l C-n outside of insert mode, it wraps the text as normal, but I can't seem to change the contents of the braces (I have tried going back into insert mode but no success).