I didn’t notice this thread before. I have exactly the same situation with my Reach RTK module. This appeared after the upgrade to 2.22.3, i.e. it was OK before. Recently I tried to test this receiver on 6/04/2020, but the session does not give good results. It was a static survey with the configuration: kinematic, GPS AR mode Fixed-and-hold, GLONASS AR mode On, GALILEO added, update rate 5Hz.
The reason is probably the lack of better time synchronization.
One more test was done on the same Reach RTK module, but in version 2.23.4. I changed the settings to enter the position ‘manual’. It is the same, i.e. the first epochs in the file are zero.