The main problem about deflaggering "sensitive" posts are that there's no option to turn on/off safe mode or to vote if posts are or not sensitive on mobile Tumblr (at least I can't find those), so I can't help as much as I want :(
For anyone else on mobile, this page may help:
https://tumblr.zendesk.com/hc/en-us/articles/231885248-Sensitive-content
This is where I found out about the things I posted about well, partially
This page doesn’t actually SPECIFICALLY mention you need Safe Mode on >:v It’s just like “oh yeah these buttons will exist v(ovo)v”
Probably the biggest section of note is this:
“You can filter out any posts that contain sensitive content from your dashboard and search results by turning on Safe Mode. Here's how: iOS:Leave the Tumblr app for a sec and go to the main Settings app on your device.Scroll down and tap “Tumblr.”Look for “Safe Mode” and adjust the settings to match your comfort level.
Android:Go to settings: Tap the little person in the tab bar, then the gear icon in the top right, then "General settings."Tap "Filtering," thenFlip the Safe Mode switch on.
Web:Go to settings: Click the little fella in the top bar, then click settings.Scroll to "Filtering," and click the Safe Mode switch on.
If you find yourself wanting to see any particular item that’s hidden—and you're over 18—there’s a “View post” button that allows you to do just that. (If you do that and discover the post was incorrectly marked as sensitive, there’s a button where you can let us know that we mislabeled it.)
Enabling Safe Mode doesn’t block or unfollow any blogs you have chosen to follow. It just gives you greater control over which posts you see and which ones you don’t.
Safe Mode is on by default for new users, and it’s always on for anyone under 18, according to the age you gave when you signed up (and rounded to the next whole year).”
Hope this helps
