Ctrl+shift to snap drawing tool to angle not working?

[mholder]

I am having the same issue with brush not snapping to constraints.

For the tools, go to preferences->toolbox->uncheck 'use tool groups'

Also, If you are using some Linux system (and maybe Windows also) be careful about using filters that result in an expansion beyond the canvas.  This will corrupt your file when you save it.
https://www.gimp-forum.net/Thread-Gimp-2-10-16