360 hydraulic lifter failure

Of the 5 lifters I cleaned, three have collapsed and the other have leaked off a little.

One that I didn't notice yesterday seems like it bled off - I don't really see movement but I can hear a click so it's moving whether I can see it or not.

I'm giving it all the time in the world to show me which lifters are bad. I won't have replacements until Monday at the earliest, then I get to disassemble and clean those, so if I'm lucky it's going to be Wednesday before I get back to reassembling things. TBH it could go to next weekend. To do the best I can about finding the bad ones, I'll just leave them as is until I'm ready to install the new parts.
I hear a lot here about cleaning the lifters. Not one person mentioned, make sure you place them back on the same cam lob that they came from. A new lifter does not matter which lob to be placed on. I made a lifter tray (a top and bottom, to seal the dust or dirt out) out of a 2x4 years ago for that reason, to get them on the correct lob.