### Author:  [@jhf2442](https://meta.discourse.org/u/jhf2442)
#### Post date: [June 9, 2019, 8:25pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/1 "2019-06-09T20:25:26Z")
I think I’ve broken something on my discourse installation - scrollbar is no longer updating when scrolling.
i.e. the indicator 1/25 changes to 2/25 and then remains at 2/25 for the remaining 23 posts. Also the URL of the topic no longer updates to `...../`
In the javascript console I can see strange error messages:
````plaintext
_ember_jquery-0ae86c…ee94f26d9c3.js:5106 [Violation] Added non-passive event listener to a scroll-blocking 'touchstart' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952
_ember_jquery-0ae86c…ee94f26d9c3.js:5106 [Violation] Added non-passive event listener to a scroll-blocking 'touchstart' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952
_ember_jquery-0ae86c…ee94f26d9c3.js:1975 [Violation] 'setTimeout' handler took 886ms
[Violation] Forced reflow while executing JavaScript took 79ms
_ember_jquery-0ae86c…ee94f26d9c3.js:5106 [Violation] Added non-passive event listener to a scroll-blocking 'touchstart' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952
_ember_jquery-0ae86c…e94f26d9c3.js:61218 [Violation] 'click' handler took 167ms
[Violation] Forced reflow while executing JavaScript took 45ms
```
Any idea how to debug this issue ?
Many thanks
````
---
### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [June 9, 2019, 8:30pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/2 "2019-06-09T20:30:34Z")
You will need to provide a link (preferably) or the full error for us.
---
### Author:  [@jhf2442](https://meta.discourse.org/u/jhf2442)
#### Post date: [June 9, 2019, 8:42pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/3 "2019-06-09T20:42:14Z")
Please try this one
[https://discourse.mfc.bayern/t/feedback-sur-le-nouveau-site/6125](https://discourse.mfc.bayern/t/feedback-sur-le-nouveau-site/6125)
---
### Author:  [@Steven](https://meta.discourse.org/u/Steven)
#### Post date: [June 9, 2019, 8:53pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/4 "2019-06-09T20:53:30Z")
When I use the [safe mode](https://meta.discourse.org/t/53504?silent=true) to deactive the theme modifications, it works well : [https://discourse.mfc.bayern/safe-mode](https://discourse.mfc.bayern/safe-mode)
Probably a script that breaks the timeline
---
### Author:  [@jhf2442](https://meta.discourse.org/u/jhf2442)
#### Post date: [June 9, 2019, 9:14pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/5 "2019-06-09T21:14:58Z")
actually it looks like it is a CSS breaking the timeline ! If I remove loading of [https://www.mfc.bayern/assets/css/headerfooter-style.css](https://www.mfc.bayern/assets/css/headerfooter-style.css) then it works
Any hint how a CSS may break the timeline (which I assume is javascript based) ?
---
### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [June 9, 2019, 9:16pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/6 "2019-06-09T21:16:56Z")
You you change the heights in the wrong place, it will break the JS that detects scrolling.
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### Author:  [@jhf2442](https://meta.discourse.org/u/jhf2442)
#### Post date: [June 9, 2019, 9:21pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/7 "2019-06-09T21:21:03Z")
which heights ? searching for height in the CSS yiels 140+ results ☹
---
### Author:  [@jhf2442](https://meta.discourse.org/u/jhf2442)
#### Post date: [June 9, 2019, 10:22pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/8 "2019-06-09T22:22:46Z")
OK found it
html,
body {
height: 100%; }
---
### Author:  [@system](https://meta.discourse.org/u/system)
#### Post date: [July 9, 2019, 10:22pm UTC](https://meta.discourse.org/t/topics-scrollbar-not-updating-due-to-css-customizations/119862/9 "2019-07-09T22:22:57Z")
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