RadEditor adding extra lines when switching between pages in RadMultiPage on FireFox 68.0, Windows 10

[Andrei]

Hello guys,

We have to open this thread as we're facing a strange behavior with RadEditor when using in a RadMultiPage control. This is happening only on Windows 10 FireFox version 68.0(Quantum) but it may happen on other versions as well.

Prerequisite:

-  Asp.Net web forms application, .net framework 4.7.2

-  RadMultiPage with some RadPageView controls

- Each RadPageView control having a RadEditor in it. Doesn't matter NewLineMode: P, Div.

Steps:

1. When the page loads, before switching tabs, write few lines in editor. Each line is rendered correct with no extra blank lines between.

2. After switching tabs, doesn't matter which one or how many times, write few lines in editor. Now, after each line, the editor added 1-2-3 extra blank lines.

When saying lines I mean paragraph if NewLineMode=P or div if NewLineMode=Div.

 

Mention that we are using Telerik Asp.Net Ajax version 2017.2.503.40, embedded resources and 'lightweight' render mode.

 

I've uploaded 3 screen captures and I also have isolated the case in a mini application to send to you, just let me know where to upload.

I hope I haven't duplicated another thread but I couldn't find anything before starting this.

 

Regards,

 

Andrei V.

 

 

[Rumen]

Hi Andrei,

Thank you for reporting this issue and the provided detailed information!

I tried to replicate it with the latest version 2019.2.514 of the editor and Firefox but without success.

Here is my test page:

<telerik:RadTabStrip RenderMode="Lightweight" runat="server" ID="RadTabStrip1" MultiPageID="RadMultiPage2"
    Skin="Silk"  SelectedIndex="0">
    <Tabs>
        <telerik:RadTab  Text="Main Course" Height="40px"></telerik:RadTab>
        <telerik:RadTab  Text="Desserts" Height="40px"></telerik:RadTab>
        <telerik:RadTab  Text="Soups"  Height="40px"></telerik:RadTab>
        <telerik:RadTab Text="Seafood" Height="40px"></telerik:RadTab>
    </Tabs>
</telerik:RadTabStrip>
<telerik:RadMultiPage runat="server" ID="RadMultiPage2" SelectedIndex="0" CssClass="innerMultiPage">
    <telerik:RadPageView runat="server" ID="PageView1">
        RadEditor 1
        <telerik:RadEditor ID="RadEditor1" runat="server"></telerik:RadEditor>
    </telerik:RadPageView>
    <telerik:RadPageView runat="server" ID="PageView2">
        RadEditor 2
        <telerik:RadEditor ID="RadEditor2" runat="server"></telerik:RadEditor>
    </telerik:RadPageView>
    <telerik:RadPageView runat="server" ID="PageView3">
        RadEditor 3
        <telerik:RadEditor ID="RadEditor3" runat="server"></telerik:RadEditor>
    </telerik:RadPageView>
    <telerik:RadPageView runat="server" ID="PageView4">
        RadEditor 4
        <telerik:RadEditor ID="RadEditor4" runat="server"></telerik:RadEditor>
    </telerik:RadPageView>
</telerik:RadMultiPage>

Since the version of Telerik UI for ASP.NET AJAX in your project is relatively old and does not officially support Firefox 64 (see here our policy for old releases and new browser versions), my advice is to update it to the latest version and test again. There is also a latest internal build 2019.2.717 which you can test too.

Please test the latest build and let me know if the problem is still reproducible. You can also switch to DIV content area mode and test with it too - ContentAreaMode="Div".

Best Regards, Rumen
Progress Telerik

[Andrei]

Hello Rumen,

 

Thank you much for the fast response. We already tried some newer versions of Telerik UI for ASP.NET AJAX and here's the result:

1. Version 2019.1.215 (public build) - issue can still be replicated

2. Version 2019.2.514 (public build) -issue fixed

3. Version 2019.2.717 (internal build) - issue fixed

 

In conclusion, the problem was already fixed and we should updated before opening this. We're sorry!

Have a good day and thank you again!

 

Andrei V.

[Rumen]

Thank you for your research! This is much appreciated.

Have a nice and productive day!

Regards, Rumen
Progress Telerik