Hi, I've noticed a couple things when uploading images in my posts.
- Thumbnail fill/fit is inconsistent across devices
I've noticed that images in posts sometimes fill to a 16:9 thumbnail size, and sometimes are fitted to it. I'll upload the screencaps in the comments as I image upload isn't working for me right now.
When I try to upload images regardless of size, they often freeze mid-upload. The circle keeps spinning. The trick I've figured out is to wait and to not type or upload any other images while the image uploads. When I do wait, it uploades pretty fast within seconds. But this doesn't work all the time. When this happens I cannot delete the loading images. They stay on the page even if I exit the page and come back to my draft, or try to publish and then edit them out. This bug has been happening for not only me but also my coworkers.