This sounds like it pourrait être the same root problème that J'étais seeing avec a sticking (and repeating) D clé in WSLg and the OP of this question was seeing avec repeated W's.
Je crois qu'est-ce que happening is that, in some cases au moins (probably when combined avec a modifier clé), WSLg gets "stuck" on one du most recent clés used avant exiting the window.
So dans mon cas, si je exited xterm avec Ctrl+D to exit the shell, ensuite when I opened another window, D would repeat endlessly.
Sometimes, when I opened a nouveau Xterm window, it would immediately exit. In this case, Je crois it was repeating the full Ctrl+D depuis le previous window.
Attempting to reproduce your particular problème, si je open two Xterm windows in WSLg, and use Alt+Tab to switch entre them, I get a repeating ääää's until I appuyez sur another clé.
Je peux tell you that the "repeating clé" problème, au moins, seems to be corrigé dans le latest Preview WSL release. This release is disponible for installation on Windows 11 depuis le Microsoft Store by searching for "Windows Subsystem for Linux Preview". I no longer see the repeating characters on this release. (Side-note: J'ai essayé the Alt+Tab scenario on another ordinateur where J'ai the released WSL/WSLg).
Cependant, there encore seems to be some "weirdness" in Alt+Tab sur le latest Preview. The first Alt+Tab seems to allez à a hidden window of some sort when tabbing away from a WSLg window. J'ai to hit Tab a second time to get vers le next "real" window. This is, of course, preferably vers le repeating clés problème.
Not that there ne sont pas bugs dans le Preview version, but il y a a lot of fixes également.
