Menu not shown with specific resolutions [duplicate] - html

Question

This question already has answers here:
Bootstrap Nav Disappears on Resize
(2 answers)
Closed 3 years ago.
I've created a default (thus I took what visual studio 2017 created when I created the project) master and sub pages website.
In the masterpage I put in a menu using a combination of divs and tables.
It all works well EXCEPT if I reduce the window size so that the width of the window is about 1280 px. Then suddenly the menu items are no longer shown and also nothing clickable on the menu bar.
One thing that stands out to me is: The menu still would have had plenty of space, but the menu items are still not shown. Only the black bar of the menu (background color is set to black for the table).
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-collapse collapse ">
<asp:Table ID="MenuTable" runat="server">
<asp:TableRow>
<asp:TableCell>
<asp:HyperLink runat="server" ID="Contacts" NavigateUrl="~/Forms/Contacts?#DynamicLinkReplace">Kontakte</asp:HyperLink>
</asp:TableCell>
<asp:TableCell>
<asp:HyperLink runat="server" ID="PingLink" NavigateUrl='javascript:void(window.open("~/forms/ping.aspx", "Ping to XXXXX", "width=640, height=480"));' >Ping</asp:HyperLink>
</asp:TableCell>
<asp:TableCell>
<asp:HyperLink runat="server" ID="RemoteLink" Target="_blank">Remote</asp:HyperLink>
</asp:TableCell>
<asp:TableCell>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow>
<asp:TableCell>
<asp:HyperLink runat="server" NavigateUrl='~/Forms/JournalT.aspx?#DynamicLinkReplace' id="JournalT">Journal T</asp:HyperLink>
</asp:TableCell>
<asp:TableCell>
<asp:HyperLink runat="server" NavigateUrl='~/Forms/JournalH.aspx?#DynamicLinkReplace' id="JournalH">Journal H</asp:HyperLink>
</asp:TableCell>
<asp:TableCell ID="MenuCellEnvelopeClearance">
<asp:HyperLink runat="server" NavigateUrl='~/Forms/Clearance.aspx?#DynamicLinkReplace' id="MenuEnvelopeClearance">Freigabe</asp:HyperLink>
</asp:TableCell>
<asp:TableCell>
<asp:HyperLink runat="server" ID="DetailsLink" NavigateUrl='~/Forms/Details.aspx?#DynamicLinkReplace'>Details</asp:HyperLink>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
</div>
</div>
</div>
.CSS is not shown as it only is used for colouring and text size (font-size 14 px, line height 1.4285).
Now my question is twofold. 1.) What is the exact cause of such a phenomenon (so that I don't stumble upon it again) and 2.) What can I do to correct this behaviour?

Answer 1

In your Default Style sheet Consider this code
#media only screen and (min-width: 1000px) {
#Container{
style:block;
}
}
May be your any css or bootstrap contain the Code of min-width or max-width properties
In future check the style sheet