Black screen when opening a random camera app on Galaxy S7 Edge on LineageOS 18.1

Since last week I upgraded my Samsung Galaxy S7 Edge from Samsung's stock firmware to LineageOS 18.1 by using this message of the XDA forum and installed the "full" edition of NicGApps. Since yesterday the camera does not always work, which is a behavior I never experienced on the stock Samsung firmware at all. When I open the camera app the screen is black. Also, when I change to the front facing camera. The only **temporary solution** is to reboot my device and everything works again. During these two days, I rebooted my device three times, and that cannot be the intention. I tried this with several apps: OpenCamera, Footej Camera, the QR Code scanner of my banking app, all the same and as I wrote, after a reboot everything runs normal again. Does someone know a permanent solution?