After reload page some my changes regress

Hi. I have a problem, when I do some changes in block "Test Detail" (may be it's problem more global, not only this one block, just I more active work with this block), and after reload page some my changes regress, and that repit always.

In first time I thought what some one with me work on the same issue, I checked it and is not that. And also I closed all open tabs with the Jira, left only one. But it not help for me.