CreateSubscriptionChange - validation error crashes client

[euang]

I'm calling CreateSubscriptionChange in 4.18 with a coupon that has already been redeemed on that subscription.

The api is returning this JSON which then fails to get parsed and throws this exception.

Newtonsoft.Json.JsonReaderException HResult=0x80131500 Message=Unexpected character encountered while parsing value: [. Path 'error.params[0].message', line 1, position 149. Source=Newtonsoft.Json StackTrace: at Newtonsoft.Json.JsonTextReader.ReadStringValue(ReadType readType) in /_/Src/Newtonsoft.Json/JsonTextReader.cs:line 671

JSON
{"error":{"type":"validation","message":"Coupon code [\"has reached max redemptions for this account\"]","params":[{"param":"coupon_code","message":["has reached max redemptions for this account"]}]}}

StackTrace
Newtonsoft.Json.dll!Newtonsoft.Json.JsonSerializer.Deserialize<Recurly.Errors.ApiErrorWrapper>(Newtonsoft.Json.JsonReader reader) Line 870
at /_/Src/Newtonsoft.Json/JsonSerializer.cs(870)
Recurly.dll!Recurly.JsonSerializer.Deserialize<Recurly.Errors.ApiErrorWrapper>(RestSharp.IRestResponse response) Line 72
at Recurly\JsonSerializer.cs(72)
Recurly.dll!Recurly.BaseClient.HandleResponse(RestSharp.IRestResponse resp) Line 269
at Recurly\BaseClient.cs(269)
Recurly.dll!Recurly.BaseClient.MakeRequest<Recurly.Resources.SubscriptionChange>(RestSharp.Method method, string url, Recurly.Request body, System.Collections.Generic.Dictionary<string, object> queryParams, Recurly.RequestOptions options) Line 169
at Recurly\BaseClient.cs(169)
Recurly.dll!Recurly.Client.CreateSubscriptionChange(string subscriptionId, Recurly.Resources.SubscriptionChangeCreate body, Recurly.RequestOptions options) Line 1813
at Recurly\Client.cs(1813)

[nls-aarndt]

Hello, are there any plans to fix this? We continue to encounter this issue in SDK version 4.50.0