@sanzmauro , not related to this specific feature, but the s field of the SplitView payload, i.e., the list of treatments, is returning duplicated treatment values.

Example for FF test_split with SDK key jksn1abebskvo510phc5lnjf9ubcgoe43rkc:

{
s: 1,
p: {
n: 'test_split',
t: 'user',
k: false,
s: [
'on', 'off', 'other',
'on', 'off', 'other',
'on', 'off', 'other',
'on', 'off', 'other'
],
c: 1669917927035,
f: {},
d: 'off',
e: []
}
}

I guess the issue might be in the append call in this line:
https://github.com/splitio/splitd/blob/SDKS-9120-impressoion-per-toggle/splitio/sdk/sdk.go#L295
Duplicated items should be removed, for example, by appending the values in a set and then converting the set into the s list.