Bug: Tilda (~) channel links sometimes not resolving

[davidmilligan]

Steps to reproduce the behavior

We are making a bot that posts things that include links to other channels using the tilda followed by the channel name, but I'm fairly certain the behavior is the same even if a real user makes such a post (also happening for posts that are bot responses to slash commands). Sometimes, these links do not get turned into an actual hyperlink to the associated channel, sometimes they do (even though the channels are public). It is most common that they do not get turned into a hyperlink if the user has not already joined the particular channel. If the user manually joins the channel and comes back to the post with the link in it, it has usually turned into an actual hyperlink at that point. This is happening on a team with tens of thousands of channels.

Expected behavior

All valid tilda links to public channels show up as actual hyperlinks to the associated channel for any user.

Edition and Platform

• Edition: Mattermost Enterprise Edition
• Version: 8.0.1
• Browser and OS: Edge on Windows

Additional context (optional)

Add any other context about the problem here, and any notes about the severity:

• Sev 3: Affects minor, non-critical functionality

The main purpose of these bot posts is to help users find channels they might be interested in joining, so if all the channels they haven't joined yet, don't actually show up as hyperlinks, it sort of defeats the entire purpose.

[davidmilligan]

sorry, opened this in the wrong repo, this was meant to be in the main mattermost repo, but I've figured out that the reason this was happening was due to uppercase letters in the link (I guess mattermost automatically converts all channel names to lowercase for linking purposes)