I'm having the same problem, submitted a bug report but I've never gotten an email back with an update or to confirm there's anything wrong. Noticed it just today too. Just want to post a comment confirming that this isn't just a problem you're experiencing alone.
Hi, i'm on Boric's task 2 and need 1 more Living Rock Brawler, mined all sites several times (longly) but the Brawler doesn't show, ...must be a forgotten issue in the Mining update i guess? Submitting bug report atm.the lone