I battled in the tower event and a scroll dropped but never showed up in my items.  I hoped it was just a delay but I went on to do a couple more standard champion battles and had another scroll dropped. It immediately showed up in my items but I only have 1 when I have 2. 

This happened today at the following times: 

23-11-2018 11:09  

23-11-2018 15:18 

I was playing in Chrome but then tried playing in the app and it didn't show either place. 

The other day I didn't see the 75% off for the resurrection event but eventually it showed up after 12 hours. 

I attempted from both home and at work and both Chrome and the app for the 2nd issue.