Thanks for sending the log file over.
The log file shows change events seem to be coming in for some files in the folder, but didn't give any solid indication of what was triggering them.
A couple of things to try:
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Disable the Movie plugin. (Preferences / Viewer / Plugins.) That's the only thing I can see opening files for writing, but it's not actually writing for them. (It's just checking if anything else has them open for writing, and closes them immediately. Shouldn't trigger notifications, and wouldn't explain why they're happening for non-video files. Still, worth ruling out its involvement.)
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Uninstall TSVN, as you suggested in your email. I'd be surprised if it is involved, but it is accessing the folder at the same time, and it is something that can trigger shell change notification events, so it's not completely impossible. Worth ruling out, at least. Be sure to reboot after uninstalling it, as it won't be fully unloaded until then.
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Enabling the Debugging steps near the bottom of here and seeing what they indicate may prove useful. Knowing more about what the change events are may help understand where they are coming from.
The only other thing I noticed from the log is that the folder is below C:\ but some of the low-level function calls look related to network drives. It's possible that is normal and just something I've never noticed before (maybe Windows routes everything through a generic function, for certain operations). On the other hand, if there's anything unusual like a junction or symlink that is pointing the folder or a sub-folder to another drive or a network drive, then that might be an important detail.
FWIW, I tried again with your config but still can't get it to happen here. The information in the tiles moves up and down once when the extra info is populated, which is normal, but it does not endlessly/repeatedly refresh for any of the files.