Framework owners running Debian testing: if disable-while-typing is not working, I think this is because the libinput quirks file contains a bug and is using an old key.
In /usr/share/libinput/50-framework.quirks change:
AttrEventCodeDisable=BTN_RIGHT
to
AttrEventCode=-BTN_RIGHT
I can’t say this is definitely the culprit, but DWT is now working for me.