More than 50 topics in the group. Every topic has a pinned message which is the 1st in the topic.
After a while pinned messages in some topics stopped displaying. I pin them again, but it disappears again. This happens if I have internet connection.only. In offline mode pinned messages are displaying fine.
Telegram Android 9.1.2 (29022), Xiaomi Mi 10T Pro, 12 S? (31)