Description:

Escaped parentheses in backticks break horribly.

Server Setup Information:

• Version of Rocket.Chat Server: 0.59.3
• Operating System: GNU/Linux 3.2.0-4-amd64
• Deployment Method(snap/docker/tar/etc): unknown
• Number of Running Instances: 1
• DB Replicaset Oplog: OpLog disabled
• Node Version: v4.8.6

Steps to Reproduce:

Post message with escaped parenthesis in backticks, e.g.

`^\s*\((\w+)\)\s*$\`

Expected behavior:

See message with \( ... \) in code formatting, that is "^\s*\((\w+)\)\s*$".

Actual behavior:

The shown string (some base64?) changes with every edit, even if the message itself is not changed.

Workaround

This is apparently some bad interaction with KaTeX; disabling "Parenthesis Syntax" returns code formatting to the expected behaviour.
Dollar syntax does not seem to be affected in the same way.

KaTeX should be disabled inside pre-/code-formatted elements.