BG Items not rendering correctly when calling fit()

[mpf82]

It seems there is an issue with rendering BG items when calling timeline.fit() if the maximum zoom level is smaller than the range of the dates in the data set.

In my case, I allow a zoomMax of 2 days:

zoomMax: 1000 * 60 * 60 * 24 * 2, // maximum 2 days

However, if I load data that spans 5 days and call fit() the BG items (in yellow) get messed up. (Messed up = they suddenly span over the whole width of the timeline).

I created a GIF to demonstrate the issue:

Once the items are messed up, scrolling all the way to the left and to the right will somehow make them render correctly (not shown in the gif).

I have tested this both in version 2.2.3 and the latest 2.3.4.

Note: The issue does not appear if the range of dates in the data set fits into the "zoomMax" range (in this case, if I select less than 2 days of data).