If your build progress page keeps refreshing, it could be due to multiple reasons. Your catalina.out or atlassian-bamboo.log should tell you what's going on.
From my experience, I've seen it happening when an apparent deadlock is caused by Bamboo that is unable to acquire new database connections.
In other words, the number of database connections were not sufficient for Bamboo and it had to be increased. Your situation might vary and your logs should hint you.
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