The screen blinks and the progress circle is duplicated during login process for multiple accounts:

Frames are not changing when scrolling videos. They must change immediately when you change the slider position

Content preview for inline-bots not implemented: longtap is missing for links from @wiki, not possible to listen songs from @music before sending them.

Voice messages recording doesn't start instantly. When using a BT headphone (like AirPods) the voice message audio is not recorded just after pressing the mic button, it takes several seconds instead.

Unable to link Telegraph articles to Telegraph account (or edit existing linked posts). When using @Telegraph for authentication, after the Log In button pressed, the page is opened inside the app.

Missing masks button in the photo viewer if masks are applied to the photo. Would be nice to have it like on Android.

Invite friends action missing progress circle for cases when user have many contacts. If it takes more than a second to load the list, the progress circle should be shown.

PiP mode shouldn't be used for forwarded video message when the message is playing in the chat.

Missing archived stickers box when more than 200 sets are added. Would be nice to have it like on Android:

Unread messages box should be hidden when there are no other messages on the screen.

Slow and distorted audio when switching to a rear camera while recording video messages.