I renamed the channel, but under the FILES tab, the old name is still there.
Active Projects was originally named 2019 Projects.
Keiichi Masaki commented
I have found related problem on that, Please see as below.
1. Upload a file to "File" Tab in "Channel A"
2. Rename "Channel A" to "Channel B"
3. Search file (uploaded on section 1) by search function.
4. Then Preview the files by search result of section 3. and select "Start Conversation"
5. File has posted on "General" Channel (not posted on "Channel B" )
It seems that a Channel information kept by files on file tab did not be updated by Channel rename.
And furthermore, If old channel information is not show currently, A file will be posted on "General" Channel.
Anthony G commented
duplicate of a known issue and they are working on it