Viewport glitch when all spline vertices are selected

Some strange things are happening to rendering of spline vertices in the viewport, when all spline vertices of a given curve are selected.
Take a look, please:
https://www.dropbox.com/s/cs0dhekonllr8as/spline_all_vertices_selected_bug.mp4?dl=1

I works fine on me.
What is the behavior if you have two splines selected at the same time?

I see the same issue, with one or more spline selected.

While here. There is the update that states:-

* Some new fuctions on spline vertex. 1. Double LMB click to delete highlighted spline vertex. 2. Double LMB click on spline to insert new Vertex. 3. Double MMB click to open closed spline at highlighted spline vertex.

But vertex are being added(inserted) with a single LMB, why??

I works fine on me.
What is the behavior if you have two splines selected at the same time?

Video with multiple splines: https://www.dropbox.com/s/oo7xw3vxl86b4zx/multi_spline_all_vertices_selected_bug.mp4?dl=1
It's also interesting to see how this glitch behaves when grid is on or off.

While here. There is the update that states:-

* Some new fuctions on spline vertex. 1. Double LMB click to delete highlighted spline vertex. 2. Double LMB click on spline to insert new Vertex. 3. Double MMB click to open closed spline at highlighted spline vertex.

But vertex are being added(inserted) with a single LMB, why??

Same here with single LMB to insert spline vertices.

Does it happen if you use default setting? If not, send me your config.

Does it happen if you use default setting? If not, send me your config.

Yes, it also happens on default settings:
https://www.dropbox.com/s/cv3zp1dlk4fnjua/default_settings_spline_all_vertices_selected_bug.mp4?dl=1

Try this
http://www.digitalfossils.com/Download/NVil-Sep-23-16.rar

Try this
http://www.digitalfossils.com/Download/NVil-Sep-23-16.rar

Thanks. There is a noticeable improvement. Spline vertices no longer completely disappear, however they still flicker when I move the cursor around:
https://www.dropbox.com/s/p8fxkkibcz8pxty/splines_glitch_sep_23.mp4?dl=1

File renewed. Try again
http://www.digitalfossils.com/Download/NVil-Sep-23-16.rar

File renewed. Try again
http://www.digitalfossils.com/Download/NVil-Sep-23-16.rar

No changes in the flickering, unfortunately.

Try this
http://www.digitalfossils.com/Download/NVil-Sep-25-16.rar

Try this
http://www.digitalfossils.com/Download/NVil-Sep-25-16.rar

Yup, the flickering has stopped.