Taking legitimate game actions towards actively winning the game should not cause you to time out.

I was playing a competitive brawl game as Bard, King of Dale against Terra Bradford (Urza).

The Terra player was essentially tapped out (could not pay for smothering tithe) and had stolen my Bard, so was drawing two cards for every Gleaming Splendor action, causing Smothering Tithe to trigger twice and create 4 treasure (I had an Elspeth token doubler on the board as well.) So I could pay for another gleaming splendor draw and force him to overdraw.

The game decided that it was taking too long and started rope burning me, and I ran out of time to complete the legitimate game actions needed to win. Why is arena not allowing me to take active game actions (not triggers, like scute swarm) and registering them as inactive timers?

Losing a game of brawl to a timer that shouldn't exist is not a fun way to lose a game.