Well, looks like my list is a great success 
Here we go, this is the number 49.
Donāt forget to report it on the technical support too. Chances they answer āthis is how it has been designedā are quite high though, unless it really is a bug that you can trigger by following specific actions. Here it is like that by default (although no working like the users are expecting / different as previous versions), so, just prepare yourself for the answer 
Iāve been there so I knowā¦
PS : There are grid lines, make sure the button is enabled.
On your first image we can see one grid line on the left.
Your color choices can just make it difficult to see.
