Missing AWS SDK execution interceptors in ExecutionInterceptorChain in Scala fat jar

I'm fairly new to scala / java / sbt and this is my first time debugging a discrepancy between code ran in 'scala' through sbt and the same code ran from a compiled jar. I have some Scala code which utilizes the AWS Java SDK to make some S3 requests. When I run my code in "Scala" using sbt or Intellij the code succeeds as intended. If I build a fat jar using sbt and run the same code in "Java" using the jar, the code fails. I debugged the failure and can attribute it to missing ExecutionInterceptors in the interceptor chain:

// Logging the code ran from 'scala' 2022-12-21 14:09:33,861 [main] DEBUG software.amazon.awssdk.core.interceptor.ExecutionInterceptorChain - Creating an interceptor chain that will apply interceptors in the following order: [software.amazon.awssdk.core.internal.interceptor.HttpChecksumRequiredInterceptor@5965844d, software.amazon.awssdk.core.internal.interceptor.SyncHttpChecksumInTrailerInterceptor@6d4a65c6, software.amazon.awssdk.core.internal.interceptor.HttpChecksumValidationInterceptor@aa004a0, software.amazon.awssdk.core.internal.interceptor.AsyncRequestBodyHttpChecksumTrailerInterceptor@4c98a6d5, software.amazon.awssdk.core.internal.interceptor.HttpChecksumInHeaderInterceptor@392a04e7, software.amazon.awssdk.awscore.interceptor.HelpfulUnknownHostExceptionInterceptor@7f02251, software.amazon.awssdk.awscore.eventstream.EventStreamInitialRequestInterceptor@dffa30b, software.amazon.awssdk.awscore.interceptor.TraceIdExecutionInterceptor@4d8126f, software.amazon.awssdk.services.s3.internal.handlers.EnableChunkedEncodingInterceptor@6d3c232f, software.amazon.awssdk.services.s3.internal.handlers.DisableDoubleUrlEncodingInterceptor@6b587673, software.amazon.awssdk.services.s3.internal.handlers.EnableTrailingChecksumInterceptor@1bcf67e8, software.amazon.awssdk.services.s3.internal.handlers.CreateMultipartUploadRequestInterceptor@5f404594, software.amazon.awssdk.services.s3.internal.handlers.GetObjectInterceptor@53692008, software.amazon.awssdk.services.s3.internal.handlers.ExceptionTranslationInterceptor@7b2a3ff8, software.amazon.awssdk.transfer.s3.internal.ApplyUserAgentInterceptor@1bbae752, software.amazon.awssdk.services.s3.internal.handlers.AsyncChecksumValidationInterceptor@460b6d54, software.amazon.awssdk.services.s3.internal.handlers.EndpointAddressInterceptor@5cf87cfd, software.amazon.awssdk.services.s3.internal.handlers.SignerOverrideInterceptor@76075d65, software.amazon.awssdk.services.s3.internal.handlers.GetBucketPolicyInterceptor@3a4ba480, software.amazon.awssdk.services.s3.internal.handlers.PutObjectInterceptor@27b71f50, software.amazon.awssdk.services.s3.internal.handlers.SyncChecksumValidationInterceptor@383790cf, software.amazon.awssdk.services.s3.internal.handlers.DecodeUrlEncodedResponseInterceptor@74971ed9, software.amazon.awssdk.services.s3.internal.handlers.CreateBucketInterceptor@131fcb6f, software.amazon.awssdk.services.s3.internal.handlers.CopySourceInterceptor@ccd1bc3] 

// Logging the same code ran from 'java' 2022-12-21 14:15:06,281 [main] DEBUG software.amazon.awssdk.core.interceptor.ExecutionInterceptorChain - Creating an interceptor chain that will apply interceptors in the following order: [software.amazon.awssdk.core.internal.interceptor.HttpChecksumRequiredInterceptor@147e2ae7, software.amazon.awssdk.core.internal.interceptor.SyncHttpChecksumInTrailerInterceptor@448c8166, oftware.amazon.awssdk.core.internal.interceptor.HttpChecksumValidationInterceptor@4470fbd6, software.amazon.awssdk.core.internal.interceptor.AsyncRequestBodyHttpChecksumTrailerInterceptor@15d49048, software.amazon.awssdk.core.internal.interceptor.HttpChecksumInHeaderInterceptor@7098b907, software.amazon.awssdk.awscore.interceptor.HelpfulUnknownHostExceptionInterceptor@503f91c3, software.amazon.awssdk.awscore.eventstream.EventStreamInitialRequestInterceptor@13526e59, software.amazon.awssdk.awscore.interceptor.TraceIdExecutionInterceptor@2235eaab, software.amazon.awssdk.transfer.s3.internal.ApplyUserAgentInterceptor@17503f6b] 

All of the interceptors of the type software.amazon.awssdk.services.s3.internal.handlers are missing from the code ran in the jar.

I'm not sure if this is directly related. My build.sbt has the following merge strategies:

 assembly / assemblyMergeStrategy := { // Don't discard Geotools META-INF service files case PathList("META-INF", xs @ _*) => (xs map { _.toLowerCase }) match { case ("manifest.mf" :: Nil) | ("index.list" :: Nil) | ("dependencies" :: Nil) => MergeStrategy.discard case ps @ (x :: xs) if ps.last.endsWith(".sf") || ps.last.endsWith(".dsa") => MergeStrategy.discard case "plexus" :: xs => MergeStrategy.discard case "services" :: xs => MergeStrategy.filterDistinctLines case ("spring.schemas" :: Nil) | ("spring.handlers" :: Nil) => MergeStrategy.filterDistinctLines case _ => MergeStrategy.discard } case PathList("reference.conf", xs @ _*) => MergeStrategy.concat case PathList("version.conf", xs @ _*) => MergeStrategy.concat case x => MergeStrategy.first }, 

When debugging compiling my jar with sbt assembly I noticed this line: [debug] Merging 'software/amazon/awssdk/services/s3/execution.interceptors' with strategy 'first' Is this related to why i'm missing the interceptors? or might there be some other cause for missing these handlers, such as a missing dependency?