I wanted to look at what was going on with the camera doing a "dmesg" and I have saw what happens every time the camera stops working and I disconnect/connect the Ekos and the camera has already stopped working.
That is:
if I disconnect/connect the camera and reset the ekos, the camera works a couple of images at most.
Then the INDI-Server and Ekos still believe it is connected but no longer responds.
If I reset Ekos then, on dmesg lines appear: "usbfs: process nnnn (indi_sv305_ccd) did not claim interface 0 before use".
And so on until I disconnect and reconnect the camera to USB3 port.
Either via USB3 HUB powered or direct to the USB3 port de la raspi4.
Look at the picture.
I hope this can give you a clue to solve the problem.
And if I can check something more (if you give me the instruction to do for check it, I'll do it)