Streaming live at 10am (PST)

Trouble with sticky when overlapping content

I´ve made a sticky column with another column on the side that is supposed to overlap when scrolling in mobile. Sometimes it works fine, but sometimes the content scrolls behind the sticky column and overlaps with delay.
I don’t know why sometimes works and other times it doesn’t.
Here´s two screenprints that show the problem.
Thank you everyone!