I use Window10
I think in the latest versions of Renoise, when it was updated to API 6.1, the CTRL + mouse drag command stopped working. This is a general failure and I do not know if taktik did it on purpose or it is a mistake (I think the latter).
He probably has not realized it, but all the sliders, the rotary wheels no longer work with CTRL + drag with the mouse for fine adjustment.
It could be considered a bug.