I noticed that I am now unable to edit the first few messages in my community build thread. I would have update it with the info about the newest builds.
I was able to edit the messages just a few days ago. I can still edit the later messages in the same thread.
Looking at my activity log and the availability of the message edit button in each message, it looks like editing is not allowed after the message is two months old (or 60 days?). That will make it really hard to publish & update any community build threads, where typically the first message contains "up-to-date" info about the build.
Please change the discourse defaults or create and additional permission that can be granted to users as needed.