Disappointed: Filters feature is broken & dangerous.

[Christopher]

I'm really kind of disappointed that the spreadsheet was released in this state. The filter capability is so broken on the spreadsheet, it's basically a _danger_ to use.

The bug has been reported, for the life of me I can't see why it's only a SEV: Medium, but here it is:
Editing cells in range, when filter is applied, modifies the cells in between
https://github.com/telerik/kendo-ui-core/issues/2880

Not only does the spreadsheet delete values from cells hidden via a filter, it _pastes over them_ as well. This makes it very dangerous to use this feature in any sort of production application because your users could experience *invisible* data loss. That to me is a huge... massive... red flag. 

Because of this issue I find I have to hack my way through the products operational runtime and am strongly considering a competitor's widget instead. I don't want to do this because we've invested quite a bit of time and money into Kendo.

I hope you have plans to address this very soon.

[Veselin Tsvetanov]

Hello Christopher,

Thank you for sharing your concerns about Editing cells when filtered bug in the Spreadsheet. Based on that, we have revised that issue and we agree, that it could impact a wide range of application scenarios. Therefore, we have decided to raise the Priority of this bug in our internal system.

This means, that the bug should be reviewed and included in our sprint planning sooner, than previously expected. Keep in mind, however, that its implementation schedule will also depend on the other tasks the development team currently works on.

Regards,
Veselin Tsvetanov
Progress Telerik

[Christopher]

Hi Veselin Tsvetanov,

  Thank you for your response. I am pleased that Telerik takes the issue seriously. My team has discovered the fix to this bug, and I've posted it on the github issue.

   I had mentioned that pasting was also an issue, but it turns out that's how Excel functions as well (pasting into filtered cells) - which I personally find really off-putting, but who can argue with Microsoft? haha. 

   Thanks again. No longer disappointed :)

[Veselin Tsvetanov]

Hello Christopher,

Thank you for the suggested bug fix. We have already started to review its possible application in order to resolve the issue. Keep tracking the GitHub item which will be updated as soon as fix is available.

Regards,
Veselin Tsvetanov
Progress Telerik