Created attachment 136382 [details] Zip of original dialog, once resized and twice resized Tested with Writer and Calc, but seems to be generic issue. The custom properties dialogue doesn't leave much space to view field names or the data they contain, but both expanding as well as shrinking the dialog window shifts the property value fields upwards so field name and value no longer correspond. After repeating this a few times, the field values are hidden completely. The locations only reset themselves when the entire properties window has been closed and re-opened, just switching tabs doesn't help. I've attached some quick screenshots in the zip.
It should be better with this commit: https://cgit.freedesktop.org/libreoffice/core/commit/?id=14afb688d3a24be302867ea614b0e30e01d168be Please try again when 5.4.2 is released :)
... And the dialog’s initial size was improved as well: https://cgit.freedesktop.org/libreoffice/core/commit/?id=507247697dc6c4a41fe17a29d522511f97040738 (this commit is 6.0-only, though).
Wow - fastest bug resolve ever :) Any chance you could find a way to squeeze feature request 112504 in there too before the caffeine runs out? :)