Using dropup="true" on a dropdown component, the menu is not displayed near the button:

https://stackblitz.com/edit/ngx-bootstrap-yrz4qu
ngx-bootstrap: 3.0.1
Angular: 6.1.2
Bootstrap: 4.1.3
This comment provide a solution:
.dropdown-menu {
transform: none !important;
}
This issue exists on Firefox for me. Chrome/Safari/Opera are all fine.
The comment about by @Getz85 does not resolve it.
Same issue here:
bootstrap: 4.1.3
ngx-bootstrap: 3.1.3
angular: 7.0.5
@Getz85 comment fixed the issue
It seems that something has changed in bootstrap which fixed the issue with dropups.
If I use @Getz85 now, the dropup appears as a dropdown. If I remove the fix, everything is back to normal.
bootstrap: 4.13 -> 4.2.1
ngx-bootstrap: 3.1.3 -> 3.1.4
angular: 7.0.7
That's not reproducible with the version 5.5.0, so, I will close it
Most helpful comment
This comment provide a solution: