Comment 8 for bug 1594988

Had the same issue with several files where the gradiented objects were scaled in an "extreme" manner.

For example on this image:
https://openclipart.org/detail/203836/fibonacci-spiral

The innermost details are very tiny, and if some of those are deleted the rendering goes back to normal.

Based on the test file uploaded here and quick checking, if the objects heights are set more than 5 px there are no rendering issues.

Tested on win 10 64bit Inkscape 0.92pre3 15195.