Extremely long time to update SNTP on 4.12 RV50

This device is connected to the internet on an unrestricted plan. I can talk to it over cellular the whole time. It does get a time update eventually but it seems to take much longer since 4.12. Has anyone else noticed this? It’s using time.nist.gov as a time server. The picture shows over 14 minutes uptime and no SNTP update yet.

I tested time.nist.gov server several times on my RV50 and sometimes the time update is about 1-2 minutes but sometimes the time update is about 10 minutes.
If I use pool.ntp.org, this issue does not happen
Maybe the response of time.nist.gov server is not stable.
Could you help to try with pool.ntp.org server?