I've heard that some people with absolute pitch lose it as they age (50's and 60's), but they tend to lose it in a weird way. Apparently, they still have absolu

I've heard that some people with absolute pitch lose it as they age (50's and 60's), but they tend to lose it in a weird way. Apparently, they still have absolute pitch in a sense, but it just kind of shifts over time so it's a little offset. It'd be like if you could still see color, but all the sudden your blues started to look purple or something like that. Curious if anyone with absolute pitch can confirm.