i-beam cursor missing / tiny scale (Win guest additions 5.2.1)

[dangr]

Windows host (5.2.0) and Windows guest with additions (5.2.1).

With a 4K screen (3840x2160) at 100% scale, the "Text Select" (i-beam) cursor is missing (not rendered). When Windows mouse properties / pointers set to a custom cursor (e.g. beam_r.cur) it is really tiny - too small to see properly.

With the host set at 300% scaling, beam_r.cur is the correct size.

[Update after further testing] c:\windows\cursors - cursors with the small 9KB file size are not scaled properly. Cursors with the > 100KB file size are.

(This affects windows guests. Using these smaller cursor files on the Windows host scales correctly.)