bug#69246: 30.0.50; persistent key input delay after using vc commands in pgtk

[Eli Zaretskii]

> Date: Wed, 21 Feb 2024 02:19:11 +0000
> From: Nick OBrien <nick4f42@proton.me>
> Cc: 69246@debbugs.gnu.org
> 
> In other words, if I press and release a key at the same time, the lag isn't
> noticeable. I only see the lag when I press a key and don't release it. When a
> key is held down and auto-repeating, I don't notice a drastic speed difference
> with or without the lag. The appearing characters just look choppier when the
> lag is occurring.
> 
> I realize this is an awkward bug to explain and reproduce, thanks for bearing
> with me. More suggestions on how to narrow down the cause would be 
> appreciated.

Isn't it expected that the key only appears when it's released?  Po
Lu, any comments to this strange issue?