Filtering Charts doesn't necessarily update upon first time loading the page

I have built myself a productivity tracker based on data from Rescue time. So, eventually I had a graph segmented based on week no. which to my suprise gives a good overview. However, due to lack of colours/and general limitations, I had to limit the date range for last 45 days. This is what I get when it works well:

So here, the lighter colour shade indicates how much productive I am. (Yeah not much, but been trying hehe.)

Now have a look here:

I haven’t changed anything, but on a load, that happens(x-axis resets). I can’t refresh to change it either, I have to fiddle with the settings, remove the filter, put it back in to make it work.

Donno why.