E2E Encryption - Decryption of messages doesn't work in browser client

Description:

After updating rocket chat server do 3.18, decrypting messages in browser doesn't work anymore (even though correct e2e password is provided). It does work in Android rocket chat client though (don't have access to iOS client).

Steps to reproduce:

1. Enable e2e encryption for channel
2. Write a message
3. Message shows encrypted string instead of a decrypted message, even though e2e encryption password is correct.

Expected behavior:

Message should be decrypted.

Actual behavior:

Message shows as encrypted string

Server Setup Information:

• Version of Rocket.Chat Server: 3.18.0
• Operating System: Ubuntu 16.04.7
• Deployment Method: manual
• Number of Running Instances: 1
• DB Replicaset Oplog: enabled
• NodeJS Version: v12.22.5
• MongoDB Version: v4.4.8

Client Setup Information

Doesn't work for any client that i've tested with other people. Only client that seem to be working is the mobile app.

• Desktop App or Browser Version: Firefox 91.0.2 (doesn't work on newest safari either, or any other browser, regardless of OS)
• Operating System: macOS Big Sur

Additional context

It seems it happened after update to 3.18.0, before it was working fine

Relevant logs:

Nothing relevant in logs, no errors. Just normal operation after restarting. Nothing in browser (client) log either.

No source file or test is identified in the report. Start by reproducing the failure in the browser client on Rocket.Chat Server 3.18.0 with an encrypted channel and the correct password, then compare the behavior with the working Android client. Done means browser clients decrypt channel messages instead of displaying the encrypted string.