Popover arrows missing after 6.0.1

[stedel]

Bug description:

6.0.1 seems to break Popover arrows pointing to the attached element.
6.0.1 seems to still apply the class, as the border, where the arrow should be, is different from the rest of the popover, when the placement is set to right or left.
6.0.0 seems to render the arrow fine.

Link to minimally-working StackBlitz that reproduces the issue:

(both are forked from https://ng-bootstrap.github.io/#/components/popover/examples )
6.0.0 (working arrows): https://stackblitz.com/edit/angular-qzprf6

6.0.1 (broken arrows): https://stackblitz.com/edit/angular-feegdc

Versions of Angular, ng-bootstrap and Bootstrap:

Angular: 9.0.7
ng-bootstrap: 6.0.1
Bootstrap: 4.4.1

[Smoggy]

Seems like it's caused by https://github.com/ng-bootstrap/ng-bootstrap/blob/master/src/util/positioning.ts#L150
in order to fix #3640

[maxokorokov]

Yikes, what a miss... thanks for reporting. Will revert #3644 in 6.0.2

[stedel]

Thanks for the quick fix!