[CSS BUG] Any :last-child selector don't work when use tooltip

[liverbool]

The tooltip was added El to next it's owner and effect to CSS like .btn-group > .btn:last-child

<div class="btn-group">
<button class="btn">
<button class="btn"> <= this is last-child
</div>

[Bug] When tooltip (on hover tooltip created)
<div class="btn-group">
<button class="btn">
<button class="btn"> <= this is not last-child (.btn-group > .btn:last-child don't work)
<div class="tooltip"> <= tooltip is last-chid
</div>

[Yohn]

this is a known issue - #5687, and I believe the BS guys will have it fixed in the next release with the pull requests that have been submitted.

[liverbool]

Thanks. :)

[cvrebert]

Also duplicate of #5865.