When I am downloading a file, or the file is a log for something, or any other rapidly changing file, Dolphin details view incorrectly reports it's size as 16 EiB, if it is placed in a subfolder of the curretly opened folder.

You can see it on the screenshot.

Reproducible: Always

Steps to Reproduce:
1. Open dolphin in details view, create an empy folder for testing, navigate to it.
2. Open konsole in that folder.
Run: $ mkdir -p test; for i in `seq 1 1200`; do echo $i >> test/a.txt; echo $i >> b.txt; sleep 0.05; done;
3. While the above is running, refresh the folder (see another bug for the reason behind refreshing, i'll link to it), expand (without navigating to it) the «test» subfolder of that folder. 
4. Observe the reported size of a.txt
Actual Results:  
The reported size of the file «test/a.txt» is either 16 EiB, or is constantly changing between 16 EiB and the correct filesize back and forth.
«b.txt» is fine.

Expected Results:  
Dolphin should report the correct filesize, that the file had at some points of time.
I mean that if the filesize is lineary increasing from 0 bytes to 10000 bytes by 1 byte in a step, and the steps are quick enough, then «1 B, 10 B, 20 B, 31 B, 42 B, 50 B,…» is ok, but «1 B, 16 EiB, 20 B, 16 EiB, 31 B, 16 EiB, 42 B, 16 EiB, 50 B,…» is not ok.

That does not happen with a top-level folder, only with an expanded subfolder.
The size that's reported in the statusbar (when the file in question is hovered) is perfectly fine, it's not affected. Even for files in expanded subfolders.