Surprising parser behaviour for `f(x, v->2+v)`

[fridis]

This

f(a T, b T->T) => b a

x := 42
y := f x v->2*v
say y

works

 > ./build/bin/fz test_lambda.fz
84

but using parentheses and commas in the call to f(x, v->2*v) as follows

f(a T, b T->T) => b a

x := 42
y := f(x, v->2*v)
say y

produces an error

 > ./build/bin/fz test_lambda2.fz

/home/fridi/fuzion/work/test_lambda2.fz:4:6: error 1: Different count of arguments needed when calling feature
y := f(x, v->2*v)

Feature not found: 'f' (one argument)
Target feature: 'universe'
In call: 'f(x, v->2*v)'
To solve this, you might change the actual number of arguments to match the feature 'f' (2 arguments) at /home/fridi/fuzion/work/test_lambda2.fz:1:1:
f(a T, b T->T) => b a

one error.

This can currently be solved by adding more parentheses f(x, (v->2*v))

f(a T, b T->T) => b a

x := 42
y := f(x, (v->2*v))
say y

which works

 > ./build/bin/fz test_lambda3.fz
84

I think it might be better to change the parser to parse f(x, v->2*v) as a call with two arguments x and v->2*v and require parentheses if one wants it to be parsed as a binary lambda f((x, v)->2*v).