A minute or two over a 24 hour period does seem high, but not positive. It could be related to the way it functions in Standby/Off mode. Which shouldn't matter if that's the case, but could be an annoyance. As long as it's keeping proper dive time that would be most important.
I know from time to time I need to reset the time on my Perdix. That's easy enough as I just need to connect it to Shearwater Cloud and it will apply the time from my phone. My Garmin is always connected to my phone, so it is always accurate. IIRC, the Perdix goes into a low power consumption mode when off. It still keeps track of the time, and maybe a few other things. IIRC, it writes the time to memory at a reduced rate when "off" compared to on. If you've got a pool you could confirm time syncs with another device, send the DC on a dive for an hour or two in the deep end, and bring up at the end to make sure they still agree.