RS150b optical output malfunction

Is it possible to somehow fix the Hifi Rose RS150b malfunction? I don’t use the internal DAC and I use an external DAC with an optical connection. For some time now I have noticed that Rose has started to output a bad signal above 96khz and there is no music. If I cut the signal to 96khz then it works. I tried to connect my dac to a friend’s and with the same cable and everything works fine. I think the problem is in the Rose software.