After resetting, test if the “Zzz Xzxzxzxz” behavior vanishes.
Open Notepad (Windows) or TextEdit (macOS) and type the same sequence. If xzxzxzxz appears there too, your or driver is faulty. If it only happens in Photoshop, proceed. Zzz Xzxzxzxz Photoshop Cc 2019