Seconds disappearing from watch face

Hello,

I was directed here by Reddit - apologies if anyone already saw my question there.

I've recently started wearing an Epix Pro Gen 2, which is my first Garmin or indeed smartwatch of any description. My watch for the last decade until a week ago was a Casio F91.

Starting yesterday, I noticed that the seconds on the watch face disappeared. There's a blank space where they should be. I checked on the watch face settings and seconds are definitely still turned on. Strangely though when red shift came on in the evening the seconds re-appeared.

Today the same thing happened, seconds disappeared but when I manually turned on red shift they re-appeared again. How can I fix this? I want the seconds visible (it's useful for work) but don't want to have to keep the watch permanently in red shift mode.

The display is on gesture mode, not always-on, and I'm using a watch face format that was preloaded on the watch, not a downloaded one. The watch is fully up-tp-date with updates as far as I can tell.

As I say I'm very new to Garmin so if there's any other information I can give that would help then please let me know.

Thanks.