Hi, using a custom table that worked perfectly for quite a while the switch fields now always save as true (value 1 in the custom table). Text fields (from the same metabox as the switches) are updated just normal, so it isn't the link to the custom table that is the culprit imho.
Please anybody an idea?
thank you so much. This was the spot I needed to look at.
I've changed the datatype to integer and everything is back up and running.
What I don't get is that I've used the bit-datatype for a few years and never had this problem. But anyway, it's fixed 🙂