Effect parameters pasting is somehow linked to effect value despite effect itself not being in selection.

[Guidev32]

When using FM, I tend to use effects to control operators separately and outside of macros and envelopes.
If I want to make that same effect on another operator, I'll use a different effect command (12xx and 14xx for example).
But when copying the effect values from 12xx and pasting them into 14xx, it changes the effect command to the one I copied it from.
From what I seen, this does happen between any and every effect command.

FurnaceTrackerBugReport.mp4

[Eknous-P]

this looks like a feature to me
but you can avoid overwriting the effect number by dong paste special → paste mix (background)

[freq-mod]

For me it's unconfortable and unintuitive enough to be worth fixing

[daliacoss]

it seems to be caused by these two lines:

furnace/src/gui/editing.cpp

Line 507 in fa1bdbe

iFine--;

(blame: dc16d52)

furnace/src/gui/editing.cpp

Line 558 in fa1bdbe

int iFine=(startOff>2 && cursor.xFine>2)?(((cursor.xFine-1)&(~1))|1):startOff;

(blame: e726ad8)