I`m currently using my keyboard on a windows 11 PC. It is paired correctly. Some keys do not work anymore. I`m not sure if it is a compatibility problem or if the keys are faulty. What is even more strange is that the keys that are not working are "diagonal" (3, E, D, C, and space bar). All the others seem to be working just fine
https://19216801.onl/ https://routerlogin.uno/ .
Is it faulty hardware? Another way to test or fix it?