When using the config option "disableUploadConfig" the signed settings don't get applied

[bureaucool]

I'm using this mux config:
muxInput({ encoding_tier: "smart", mp4_support: "standard", defaultSigned: true, signingKeyId: process.env.MUX_SIGNING_KEY_ID, signingPrivateKey: process.env.MUX_SIGNING_PRIVATE_KEY, disableUploadConfig: false, disableTextTrackConfig: true, }),

When using disableUploadConfig the uploaded videos are not signed by default as stated in the upload config.

This issue occurs in the plugin version 2.8.0, 2.8.1 and 2.9.0, I haven't tested previous versions but is working in the past.
For me it's a crucial setting as I don't want the client to disable the signed option by default and i don't want to overwhelm them with all upload settings.