I ordered the kit with the PRV from this website, while I’m waiting for that to get here I plugged the leaking PRV with a 1/2 FIP plug.
We were also experiencing loss of water while showering once in a while.
I thought it was due to the leaking PRV bleeding off water pressure but plugging the PRV did not fix it.
While troubleshooting, I ended up taking the pressure switch off the pipe and noticed the pipe was clogged with sediment I cleaned that out and everything is working as it should again.