MacBook Air 2019 keyboard and trackpad unresponsive after wake.

Hello Axel, thank you for your reply. I did not respond sooner because I wanted to check how the system will behave after I followed your advice. I did reset SMC and NVRAM/PRAM but it only helped for about 5 days. Today the no bluetooth mouse and keyboard window popped up again and the built in keyboard and touchpad were unresponsive once more. Admittedly, this lockout was shorter than before but I assume that with time it will be getting worse. Yesterday there was a hint that the problem will reappear because after wake the touchpad/keyboard were unresponsive but only for a second or so and no window popped up.

I didn't have this issue in safe mode but I have only worked a couple hours in that mode. I don't know if it is advisable to work only in safe mode for a week or two. If that is not a problem then I could do that to check if the problem will reappear. if it does then admittedly the only thing left to do will be to reinstall the macOS.

Hello Axel, I have only two items listed on my login list. OneDrive and Microsoft To Do. I doubt any of these is the culprit, besides I have no keyboard problems after a restart. These happen only when I wake my computer from sleep or from screen lock. A restart actually helps (for some time at least). However your mention of the startup programs got me thinking and I wonder if my Eset Cyber Security Pro might be the culprit. I can't remember if I had these problems before I installed it and I believe it to be the most intrusive program that I use. It is not listed on the login tab so I guess I will have to uninstall it completely and then check if these problems return.

Hello Axel, first of all I hope that you don't feel ignored by my lack of answers but I simply want to reply only after I have something new to add. It's been a week now since I removed Eset Cyber Security Pro and there was not a single problem with touchpad or keyboard. Even more so my MBA seems to be more responsive and maybe even the battery life improved a little. Looking back I now do recall that even though my Eset was up to date a window sometimes (very rarely) popped up informing me that it has outdated resources which will be incompatible with future versions of MacOS (sorry, I can't recall the exact message). All in all so far it seems that in my case Eset was the culprit. This is unfortunate since I would rather have it installed and feel a little better protected online (at least that's the impression I had, I don't really know what is the real threat potential for Macs without antivirus software). So far I decided to wait for the next big MacOs update which I presume will happen soon and then I will reinstall Eset Cyber Security Pro to see if this issue returns.

Thank you very much for all your help :)