Prebid - Index video outstream configuration with multiple playerSize in bidders - prebid.js

Question

I would like to create an adUnit video outstream with multiple playserSizes for Index (documentation there
At first I thought to put the playerSize at the adUnit level, but because I want to define multiple playerSizes, I decided to move it at bidder level in params > video > playerSize. Nonetheless it does not work whereas in the documentation it is written
If you are using Index’s outstream player and have placed the video object at the bidder level, you must include the Index required parameters at the bidder level``` (link above)
Here is my prebid configuration
```javascript
{
"code": slotCode,
"sizes": [[1,1],[300,250],[160,600],[300,600],[640,360]],
"bids": [
{
"bidder": "criteo",
"params": {
"networkId": networkId,
"video": {
"playerSize": [640, 480],
"skip": 0,
"playbackmethod": 1,
"placement": 1,
"mimes": [
"video/mp4"
],
"maxduration": 30,
"api": [
1,
2
],
"protocols": [
2,
3
]
}
},
"userId": {...},
"userIdAsEids": [...],
"crumbs": {...}
},
{
"bidder": "index",
"params": {
"siteId": siteId,
"size": [
640,
360
],
"video": {
"playerSize": [640, 480],
"h": 640,
"w": 360,
"protocols": [
2,
3,
5,
6
],
"minduration": 5,
"maxduration": 30,
"mimes": [
"video/mp4",
"application/javascript"
],
"playerSize": [
640,
360
]
}
},
"userId": {... },
"userIdAsEids": [...],
"crumbs": {...}
}
],
"mediaTypes": {
"video": {
"context": "outstream"
}
},
"pubstack": {...}
}
If I use this configuration, I got this error
ERROR: IX Bid Adapter: bid size is not included in ad unit sizes or player size.
Even if my playerSize for index ([640, 360]) is in the adUnit sizes.
I wonder if it is possible for an adUnit to have multiple payerSizes?