I'm aware a few folks had issues with no guardians spawning in ocean monuments. I too had this issue.
However, seems like most folks with the problem had the elder guardians in their monuments from their introduction
til the bug fix which has brought normal guardians in also.
I've never had the three elders that come per monument, and still do not. I do now have the norm' guardians though.
(So far checked the 2 monuments I've found in my map)
Just curious if anyone else has this issue. Tried using the MC bug hunting/searching thing, but seems no matter what I search
or try to refine it just brings up unrelated bugs/random results to the search
An occasional temple won't have elders.
For you to have two in a row is just bad luck.