Changing the border settings on Table properties dialog has no effect on Impress table. However if I change the border settings again, the previeously set settings are applied. I can do the again and agaian and always the prevously set properties are applied not the current one.
Steps to Reproduce:
1. Open Impress
2. Insert Table
3. Open Table Properties dialog and change border settings (color)
Border settings are not applied on the border. It still has a white border color.
Border settings should be applied on table when Table Properties dialog is closed
User Profile Reset: No
User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36
Workaround: Save and reload.
It seems, that it has been reported earlier in e.g. bug 56778, bug 64498, bug 83507, bug 94556, bug 85909. The latter seems the best one to use as "active" bug.
*** This bug has been marked as a duplicate of bug 85909 ***