Tabs in Excel Online worksheet move unexpectedly

SergeiBaklanI've encountered the same problem, and I've been searching for a solution for months. I'm one of only two users in the spreadsheet where it happens most frequently, so I am certain it's not another user moving tabs. Like the OP I've tried to recreate the problem but have been unsuccessful. I'll be in one tab, entering data, then I'll click over to another program (check my email, for example). When I click back to Excel Online, I'm still in the same tab. But as soon as I click a different tab, the old tab moves next to the new tab I clicked on, and I'm forced to drag it back where it belongs. Locking the sheet isn't an option for me, as worksheets must be added and removed frequently.

Just wanted to add my voice to others having this problem.