First Time Puppy Was Home Alone

We have a 15 week old Husky puppy. She’s been amazing. Her only issues have been with confinement. We learned early on that a crate is much less effective than a larger space as she’s not destructive when she has more space. I’ve been working from home since we got her at 8 weeks. I’ve been training leaving her alone in gaining increments starting at a minute until we were up to around 15 minutes completely alone. She has been left in a separate room for over an hour before and has only had issues when she can see us but can’t reach us, but is fine when we are out of site. She has never struggled with separation. We can go outside, upstairs, close doors, and she’s fine. She struggles more with confinement and not being able to move around freely, but could care less if we are in the room or not. Fast forward to today. I had a meeting I had to be physically at. I completely puppy-proofed a room with a 5ft fence across the opening and a curtain so she couldn’t see past the gate (seeing out triggers her confinement anxiety). I left and was gone a couple of hours. When I returned, everything seemed fine. She hadn’t escaped, the fence was still in place, and nothing was chewed up. I could also tell that she laid down in her crate at some point. Now to the issue. About an hour later, she was chewing on her toy when I noticed blood on it. I check her mouth and she has broken both of her top baby canine teeth somehow. She’s eating and drinking normally and I called our vet who said to just monitor eating and drinking from home since they are baby teeth and about ready to fall out anyways. My bigger concern is that she’s hurting herself when left alone and now I’m afraid to try it again. The internet is saying that it doesn’t sound like she was injuring herself, but rather it’s just a combination of her chewing harder due to stress or pulling on the fence and that they were baby teeth that were fragile and ready to come out. Nothing else in the room was moved or had any signs of her being destructive or trying to aggressively escape. I can’t even tell where she broke the teeth at. Let me know if I’m overreacting or if we need to go back to the drawing board on her being left alone. Thank you!