Error when loading history in browsers channels window

[Pavlo9999]

After upgrade from version 5.21 to 5.30 or 5.31 I have an error in db container:
ERROR: canceling statement due to user request
STATEMENT: SELECT p.*, (SELECT COUNT(Posts.Id) FROM Posts WHERE Posts.RootId = (CASE WHEN p.RootId = '' THEN p.Id ELSE p.RootId END) AND Posts.DeleteAt = 0) AS ReplyCount FROM Posts p WHERE (CreateAt < (SELECT CreateAt FROM Posts WHERE Id = $1) AND ChannelId = $2 AND DeleteAt = $3) ORDER BY ChannelId, DeleteAt, CreateAt DESC LIMIT 30 OFFSET 0
And history doesn't load with error 500 in the browser console. Our Database size 11 GB. Also, I have changed the QueryTimeout value in config.json from 30 to 300 seconds according to the documentation here. After that history was loaded in 2 minutes. Before upgrade history loaded faster (I didn't change the default QueryTimeout parameter).