Create a tuplet on a selected mmrest leads to corruption

2.1 version 871c8ce/ Windows10

1) New score with part, eg: mmrest tuplet.mscz
2) View part

- Your aim is to begin by a tuplet. But let's say you are a bit tired or in a rush or by discover the programm (in my case: second one, by testing something) :)

3) Select the mmrest (or the range selection, no matter)
4) Ctrl + 3

Result: you say... oops! Unexpected.

5) then type 5-> again Ctrl + 3 (You forgot to undoing...)

You say: whew! And

6) Enter your tuplet

7) Save/Close/Reload:
mmrest tuplet save.mscz

Result: corruption, which leads to bad things of course (nevertheless, the corruption is visible before save, in main score, measures 11 and 22)

- Many other related scenarios, in particular after deletion of the tuplet: satb.mscz
So, the score is already corrupted -> ignore -> cut the tuplet -> bad things type measure 0/1
Other result:

- In any case, the main point is the sequence of steps # 3 and #4