doc: issues to look out for during rewrite

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[Andre601]

I'm posting this here (As it says in the readme to not open any issues yet) and idk if this is something that has been reported yet and/or can be fixed, but right now, visiting a channel will usually not show the end of it, even tho there are no new messages to read.

As an example, this is how the Revolt Updates channel is loaded when I switch to the Revolt Lounge server:

I want to emphasize that I haven't scrolled up or otherwise touched anything. Just visited the web client, clicked the Server Icon of Revolt Lounge and had the channel load itself.

Using Firefox 109.0, tho I also had this behaviour with Microsoft Edge.
PC is Windows 10.