XIAO RA4M1 using internal RTC

Hello there,

I am new to the seeed world, especially with the XIAO RA4M1. I am using the Arduino IDE and am currently trying to utilise the internal RTC of the RA4M1. With the RTC library from the Renesas core I can set and read the time. However, the alarm time does not seem to work properly (a 10 second timer triggers the first time after 10 seconds and then strangely every 60 seconds; the minute timer with one minute triggers after 6 minutes) etc.
Does anyone have a solution for me? Is there another library that works? Or would it be possible to adapt the above with the appropriate sources?

Thank you!
Han