Here are 3 bugs related to assignment operations:

The result for the operation above should always be <0, but when using rnd"1" this is not the case. Using rnd(1) works as intended.

In this code, the sum of tab[1] and tab[2] should always be 4, but it's not always the case. Using rnd(2) instead of rnd"2" doesn't fix the issue in this case, you have to make a separate assignment for the table index. tab[rnd({1,2})]+=1 doesn't work correctly either.

Here rnd"2" is read as a function, as if the code was just a+=3-rnd. Using rnd(2) fixes it.

Looks like the 1st and 3rd bugs listed are fixed in 0.2.2c. Only the second one remains.