Missing peers data for some companies
If you look at Hotel REITS like:
https://seekingalpha.com/symbol/PK/peers/comparison
https://seekingalpha.com/symbol/AHT/peers/comparison
and mREITS like:
https://seekingalpha.com/symbol/NLY/peers/comparison
you'll see that they have no peers. The mREITS have been like this for longer (more than a year), but the Hotels seems to be a new issue. I believe it worked fine 1-2 months ago.
Upon further checking it seems that this is affecting lots of other ticker symbols, regardless of the industry. Definitely a new bug.