I just saw, that the folder sizes for some folders are reported to have 0 Bytes, when at the same times label filters (highlighting files newer than 3 or 15 days, resp.) are used. When reloading, the correct sizes flash up for a split second, eventually showing 0 Bytes again.
Most likely the same bug as this: DO12 - Size column not calculating in beta 12 & 13
If so, we should have a fix soon.
Oh, ok, thanks.
Please try Beta 14 and let us know if this didn't fix the issue.
I think, that was fixed in that Beta, sorry, didn´t report back. But it seems to be reintroduced in Beta 15. 