Scribble stopped working in the split view of the reader, after the update. It works when the page is viewed in landscape mode. Please let me know if any additional information is needed.
There is a pen enable/disable option at the earlier page in landscape mode at the top, where if it is disabled it needs to be enabled again from the same location. You need to go back to landscape mode in order to change the mode. There is no result if the pen is disabled form the main location.