I’ve pared down my core web fonts and deactivated the system fonts I don’t need (Sierra). I’m wondering if there’s any way to deactivate the core web fonts from the InDesign CC2017 list. The set I’ve activated is at the top, but then the Sys fonts and the Core web fonts are below.
Sounds like you have streamlined things quite a bit. InDesign can activate its own fonts and that might be what you are seeing. You might check over on the Adobe forums as well for that.
Thanks for using Suitcase Fusion!