400 bad request using role with Perplexity

[dev-microcosm]

Describe the bug

Using a Perplexity model with a role flag gives a 400 bad request.
"error, status code: 400, status: 400 Bad Request, message: After the (optional) system message(s), user and assistant roles should be alternating."

Setup

• add your Perplexity API key
• add a role (I am using the 'shell' example)

Please complete the following information along with version numbers, if applicable.

• OS: Ubuntu 24.04.2 LTS
• Shell: PowerShell 7.4.7
• Terminal Emulator: Ghostty 1.1.3
• mods: 1.7.0

To Reproduce

Steps to reproduce the behavior:

1. run a prompt with the role on a Perplexity model
2. get a 400 error (non Perplexity models and Perplexity models without the role flag seem to work fine)

Expected behavior

I expect a response using the provided role like the other AI models.

Screenshots