DateTime picker, month and arrow are not displayed
Hi,
I just saw this small issue with my datetime picker widget :

On the top of the box I should see the month and arrows but I see nothing. When I check the css at the runtime, they are here but most of their properties are not used and it's why they are not displayed.
But the question is why ?
I changed the button style and localization tokens but even if I revert my changes it does not solve the problem.
If you have any ideas.
Thanks

