Got these three cacti/succulents about 4-5 days ago and I am seeing disfiguration features in one. I last got the info it was a Hawthornia Venosa subsp tessellata from google,yeah I’m not sure that’s what it really is either. It took a photo of the plant a few days later and theres a part of it I’m worried about, I leave it in the sun with my two other cacti,that both like full sun, but plan to put it in its own pot due to the info that it’s a part sun lover, I got that from google and don’t know if it’s right, I watered this one ,along with my other cacti, 4-5 days ago,when I got them, I don’t know what to do, any help?(for clarification the tips are cut short and kinda rough and have crust) please know I just got this app and haven’t gotten to scan this plant,I made this post away from home.