Anchors break after clicked once

[ell1e]

Description

I noticed something which makes navigating documentation on gitea quite irritating: anchors break after clicked once. An anchor on every other page I've ever visited can be clicked multiple times in a row with scrolling in between, and every subsequent click will re-center the view to the anchor. Not when viewing a markdown file on Gitea however, only the first click works and then it just won't recenter anymore.

Try here by clicking the "Test anchor", then scrolling away with it still in view, then click it again (which should recenter the view once more and undo the scroll, but it doesn't): https://try.gitea.io/blablablablab/BlaTest/src/branch/main/README.md

Gitea Version

1.19.0+dev-39-g2900dc90a

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

Screencast.from.11-04-2022.12.52.41.PM.webm

Git Version

No response

Operating System

No response

How are you running Gitea?

I'm not, but this reproduces on all instances run by others that i have tested

Database

No response

[silverwind]

Might be some JS interference, I'm not sure.

[apachejuice]

This happens on the central gitea instance for me (https://gitea.com) but interestingly not my own at https://git.apachejuice.dev (for example in this page the anchors seem to work fine)
Specs of my gitea server:

Edited: lack of closing paren

[silverwind]

I can reproduce on your instance as well:

• Click anchor, page scrolls to it
• Change scroll offset
• Click same anchor again, page no longer scrolls to it

[apachejuice]

I did the exact same, although after reloading the page it appears too