I have waited and debated buying a potion for a while. I finally decided to get a legendary potion. I had recently used the free potion. I purchased the legendary potion for 1000 gold coins. Nothing happened. I tried exiting the potion page and going back, nothing. I noticed my version was out of date so I updated. When I returned to the page it said the potion was brewing. I figured I needed to wait for the 22 hours to pass. I waited 22 hours. The game gave me another free potion and still says its brewing my legendary potion.
Device: Samsung/Android
App version: Just updated yesterday while issue was happening.
I have a screenshot but cant seem to add it here.