I don’t have an xSIID, but have you tried opening up the KBR1 (4 x small Phillips screws, each under a foot pad)
See how well the antenna reads your xSIID out of the case, or move it to a known location so its easier to find.
I moved mine under the “D” of the
logo
…and maybe clip/ fill/ desolder the piezo if you don’t like the beep
Also, try it in different usb ports if possible, you may get better results using a higher power USB port