Please check my comment below.
1. Missing epocs in raw data recoded by RS2
We’ve conducted multiple tests and may confirm that Reach RS2 may lose some epochs in raw data. We’re now working on the solution, as I mentioned above.
2. Missing L2 carrier phase in raw data recorded by RS
I examined all the data you shared here and over email once again and can conclude the following:
According to the data you shared, there is no L2 recorded for the G14, G20, and G21 satellites in RS2 raw data.
As Christian said above:
These IIR satellites provide the following positioning signals: L1C/A, L1/2P(Y).
Reach RS2 is able to track GPS L1C/A, L2C.
It seems that the CORS station you mentioned can track L2P signal, that’s why it provides L2 observations. As for Reach RS2, it can track L2C only that is not transmitted by these satellites.
That’s why I assume there should be no issues with logging L2 carrier phase in raw UBX data.
Please let me know your thoughts regarding this case.
3. Converting UBX to RINEX in RTKLib issue
We expect to release the fix to this issue as soon as possible.