I also have this issue with the comment replies. I.e. if I get a notification of a reply to a comment I made and I click on it, it takes me to the post but not to the comment itself.

Also the notification disappears but after a minute or two it is back.

Maybe you are aware of all this.

Two more things:

First of all thank you for all the work in developing the app (progress is very apparent)

And lastly what is the app written in? Would love to help if I can.

Cheers!!