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Hi. When changing deprecated `Apache` engine to `Apache5` with Ktor 3.5.2 client, my requests are failing with `Content-Length mismatch: expected 5696 bytes, but received 20120 bytes` error. I see some old similar bugs (e.g. <https://youtrack.jetbrains.com/issue/KTOR-7934/JS-WASM-fails-with-IllegalStateException-Content-Length-mismatch-on-requesting-gzipped-content|KTOR-7934>) but I'm on the latest version and on the JVM. It looks like some problem with gzip but I'm sure my server is sending correctly gzipped data.

this was a problem in JS/WASM because the browser handles compression automatically so the content length doesn't match...  it shouldn't happen in JVM clients

We had to use `customizeClient { disableContentCompression() }`  in a jvm backend too

Unfortunately I can't reproduce the problem with a simple application. There must be some dependency issue.

My `build.gradle.kts`:
```plugins {
    kotlin("jvm") version "2.4.10"
    id("org.springframework.boot") version "4.1.1"
}

group = "com.example"
version = "1.0-SNAPSHOT"

repositories {
    mavenCentral()
}

dependencies {
    implementation("io.ktor:ktor-client-core:3.5.2")
    implementation("io.ktor:ktor-client-apache5:3.5.2")
    implementation("io.ktor:ktor-client-content-negotiation:3.5.2")
    implementation("io.ktor:ktor-serialization-kotlinx-json:3.5.2")
	implementation(platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES))
}

kotlin {
    jvmToolchain(25)
}```

And the application that doesn't work:
```suspend fun main() {
    val httpClient = HttpClient(Apache5) {
        install(ContentNegotiation) {
            json()
        }
    }
    httpClient.get("<https://www.google.com>").bodyAsText()
}```

From what I can see Ktor is using httpclient5 `5.5.1` while Spring BOM is forcing `5.6.4`

Still, in my opinion it's a very strange side effect.

that _is_ a very strange side effect... apache must have made some significant changes between these two versions...

I also confirm just adding `implementation("org.apache.httpcomponents.client5:httpclient5:5.6.4")` instead of Spring BOM breaks Ktor as well.

`Support for transparent content decompression and content compression with deflate, gzip, zstd (optional), and brotli (optional) codecs in the async transport.`

<https://youtrack.jetbrains.com/issue/KTOR-9832/Upgrading-Apache-HttpClient5-to-version-5.6-breaks-Ktor-client-with-Content-Length-mismatch-error-for-any-gzipped-content>