In ARAM, if someone trades you before you enter the room, you can't trade at all

Re-posting this from 2 months ago because this problem is still ongoing:

Exactly what the title says. If I enter a room before anyone else does, which is all the time because slow computer, and they trade me before I enter the room, the arrows will disappear and I can't see the trade or trade anyone else until the trader cancels the trade.

Steps:

1. Have slow internet
2. Accept a game
3. Hear the sound of someone trading you while the screen is black so you haven't entered yet
4. See that you can't trade anybody at all until that person cancels the trade

Every subsequent attempt at anyone trading you after this happens will result in the same thing happening. This happens every time someone trades me prematurely to my entering.

The above picture is an example of the issue. The Azir traded me before I entered so now I can't see the trade or do anything with trading.

Thank you.