The DiscoTOC disappear in some users' view

Support
1

The TOC disappears yesterday*, but it works fine on iPhone.
(* Works fine before yesterday)

I thought it’s due to the Chrome extensions, so I remove some for testing. However, it doesn’t solve the problem.

So I do more testing with different account on a same computer. Here comes the result.

Any idea how to solve this?

Thanks for help in advance.

User 1 User 2
1. TOC in post X O
2. TOC in post with incognito mode X O
3. TOC in Composer X X
4. TOC in mobile O O

User 1:

User 1
User 11920×1830 222 KB

User 2:

User 2
User 21920×1808 251 KB

2

Update info. after 10 hours.

Now the user 2 behave the same as user 1(desktop failed, iPhone works fine).

I will rebuild to see if this way solve the problem then.

3

Things look pretty broken at this moment

image
image1217×296 18.3 KB

4

Update: All works fine after rebuild app.

Thanks for @RGJ great input!