I am parsing some json into a class like this

class RateResponse
{
    [JsonPropertyName("rate")]
    public decimal Rate { get; set; }
}

this JSON has "rate":2.59862290042482836918240E-10 part and I am parsing it with standard System.Text.Json api on .NET 8:

JsonSerializer.Deserialize<RateResponse>(json, new JsonSerializerOptions { PropertyNamingPolicy = JsonNamingPolicy.CamelCase });

It works fine on my local Windows machine, I am deploying it to Ubuntu VMs in a docker container (all standard IDE generated). Now I have 2 physically separate environments: dev and staging, this exact code works fine in dev but in staging it never succeeds and just keeps writing logs: Cannot get the value of a token type 'Null' as a number.

How is this possible? Isn’t docker supposed to guarantee exactly the same runtime? What could be the reason of it? Some culture specific settings fetched from somewhere?