sap.m.Popover with VBox content shows horizontal scrollbar

[bfopta]

OpenUI5 version: 1.133.0, but older versions are also affected (1.120)

Browser/version (+device/version): latest firefox on latest macos
(I know it is not officially supported, feel free to close the issue without fixing it)

Any other tested browsers/devices(OK/FAIL): latest chrome, safari - works OK

URL (minimal example if possible): official popover sample with a small modification: wrap the content in a VBox and make it long enough to show a vertical scrollbar

Steps to reproduce the problem:

1. Replace view/Popover.fragment.xml with this:

<core:FragmentDefinition
	xmlns="sap.m"
	xmlns:core="sap.ui.core">
	<Popover
		id="myPopover"
		title="{Name}"
		placement="Bottom">
		<VBox>
    		<Image src="{ProductPicUrl}" />
    		<Image src="{ProductPicUrl}" />
    		<Image src="{ProductPicUrl}" />
		</VBox>
	</Popover>
</core:FragmentDefinition>

2. Open the popover
3. See the unnecessary horizontal scrollbar

What is the expected result?
The popover should fit the content and shouldn't show a horizontal scrollbar

What happens instead?
There is a horizontal scrollbar

Any other information? (attach screenshot if possible)

[TeodorTaushanov]

Hello,

Thank you for sharing this finding. I've created an internal incident DINC0426785. The status of the issue will be updated here in GitHub.

Regards,
Teodor