Yes, not uncommon. Some triggers are not as quick as advertised. Even the expensive ones.
I had to argue the math to Elinchrom a few years ago. Their original Skyport remote used to be advertised to handle 1/1000s, in reality is was 1/125s. Well below Pentax 1/180 at the time. I believe they advertise a much different number now.
FYI, There is nothing wrong with 1/125s or slower if your flash(es) are significantly overpowering the ambient light. This should be a goal in most cases, but cannot always be avoided. The slower shutter can be an issue if that is an important consideration for the types of photos you take.
Most light meters will have a mode where they wait patiently for a change in light. The speed of the flash sync doesn't matter. You simply fire the flash manually and the meter detects the light and reports it's values. Or just go the cheap route, and adjust the lights and/or the camera exposure until the image comes out correct. (SD card space is cheap).
---------- Post added 07-06-18 at 05:50 AM ----------
Originally posted by jpipg Thanks for the info. I think it was the triggers causing a bad sync, I'm careful to keep within the sync speed although the KP lacks an X setting, so I may have knocked the dial for shutter speed.
Ricoh/Pentax does not allow the flash pin to fire above the shutter sync speed. So normally you don't have to worry about setting your shutter speed too fast, as the flash won't even fire if you do. But the flash system might not react quickly enough and can force you to slow down your shutter anyway.