If you are on the Android Central app have you tried the paper clip then Gallery. Much as I dislike the changes to the new version, Tapatalk has been the best for me to post and view photos/screenshots full size. You would need a separate one time log in name and password for Tapatalk, then log in to AC and it keeps you logged in.
The AC Forums app is similar to older Tapatalk afaik.
You may have tried and have a specific issue though. You have more than 10 posts so it's not that.
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