This is a test message with reactions. For me, reactions are not displayed, showing a blank icon instead

The next stickers are also not shown:

You may also go to https://xn--r1a.website/premium channel and see that some stickers from there are not shown. If they do, try to clear cache and view them again.

The next sticker will be shown, but it will cause your CPU burn one extra core when you view it: