Output seems to have a bug where some previous chars aren't deleted on update

When I run my timer for long enough, it seems to fail to re-render the line resulting in bizzare spelling issues that gradually become gibberish for each update. When the minute count no longer is necessary, the seconds from that format stick around as seen below.


Start by reproducing the timer update for long enough to cross the minute boundary, using the example behavior in the issue as the expected failure. Trace the terminal line-update path and verify that each refresh removes all characters from the previous output, including leftover seconds.

Written by the indexing model from the issue text.