[Bug] Offline chat hosting another channel console error (Low Priority)

[FierySama]

Describe the bug
Injected-content.js is throwing a console error when an offline channel is hosting another channel with custom emotes in the offline channel's chat. specifically when hosting a channel, then switching to offline chat, this is where the scrollHeight is shown as undefined.

To Reproduce
Steps to reproduce the behavior:

1. Host a channel
2. Go to your channel url
3. Switch to your offline chat instead of hosted recipient chat
4. Check console for scrollheight error!!!

Expected behavior
I'm not sure if this has any visual impact from what I have seen.

Screenshots

Environment (please complete the following information):

• OS: Windows 10
• Browser: Chrome 78
• MixrElixr Version: 2.9.2

Additional context
Add any other context about the problem here.