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Testing and Issues
You can test this app and submit issues during the testing period of the Android Contest 2021 contest.
Entries with serious issues will not be able to win the contest, but even minor issues might be important for overall results.
The reason of this bug is extra argument in TL schema https://core.telegram.org/constructor/documentAttributeSticker
Old steps to reproduce (fixed on backend):
1. Open chat
2. Send as file with extension .webp
New steps to reproduce:
1. Open channel https://t.me/test_files_documents
Message is sticker
Message is document
During the bug fix, it was reproduced. Now it fixed for new messages on server side.
For old messages it steel have extra argument in TL schema, link for testing https://t.me/test_files_documents.
Screenshots before and fixed: