MCU fader riding freezes because of UNDO Activated

A) Critical Issue with undo point creation and MCU

There are three licecaps :

1)I'm writing to a volume envelope with a tascam US 2400, UNDO is OFF



Everything works as expected : my fader riding is natural and continuous.

2)I'm writing to a volume envelope with a tascam US 2400, UNDO is ON :



Now there is a problem, each time I stay on the same value for a short time, REAPER create an UNDO point, although my finger is still touching the fader. It should only create an undo point once my finger leaves the fader.

3)I'm writing to a volume envelope with REAPER's fader, UNDO is ON :



It works as expected, UNDO point are created only when I release the click.

CONCLUSION : There should be an option to "don't create undo points till the finger leave the fader".
BTW, you can also add the option to "Start with MCP visibility" (I don't have the "global view" button on my Tascam so I have to cheat each time I start REAPER).


B) Poor performance of UNDO point creation.

I find a bit strange REAPER is freezing to write an undo point of such a little piece of data, especially on a big computer and reasonable CPU projects .
On big projects it is very very annoying, and I don't see a reason writing a tiny undo to memory should be longer along the envelope data of the full project gets bigger (with same FX/Items).