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Modern ComboBox 1.0.0 issue in Form

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Posted on by IA-24091907-0

I am using the updated modern combo box in a form but I am seeing a problem that is a show stopper. Can someone plz confirm?

I have Form for a DV table that has a lookup to another table with values of [A,B,C,D,....,Z]

I replaced the lookup with modern one. disable multi-select
I updated the items property to the following Search('DV Table', Self.SearchText, 'Primary Col')
set data row limit set to 5. This will make the default dropdown show [A,B,C,D,E]
search for a value like [F] that is not listed the default dropdown, Search will work and it will show up.
select it it will not select but rather goes back to the old selection.

Please note: The expected behavior works outside the FORM Control.

Thanks

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11manish 3,333 on at

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The behavior you're describing—where searching for a value outside the initial "loaded" set (the first few rows) allows you to see the item but causes the selection to "snap back" or fail—is tied to how the Modern control handles the Items property when it is dynamically filtered by Self.SearchText.

Why this happens?
The Modern Combo Box requires that any selected item must always exist within the current Items table.

When you type "F", the Search() function executes and the Items list updates to only show "F".

You select "F".

The moment you "click" or the control loses focus, the SearchText often clears or resets.

Because SearchText is now blank, your Items property reverts to the default (the first 5 records: A, B, C, D, E).

Since "F" is no longer in that list of 5, the control assumes the selection is invalid and reverts to the previous value to prevent a "broken" record.

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BCBuizer 22,833 Super User 2026 Season 1 on at

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Hi @IA-24091907-0,

I tried replicating the issue you described, but unfortunately was unable to. Can you please share the full code of the control to verify the settings? You can obtain this by right clicking the control in the tree view, or by clicking the ellipsis next to it, and then select View code:

If this reply helped you in any way, please give it a Like 💜 and in case it resolved your issue, please mark it as the Verified Answer ✅.

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IA-24091907-0 19 on at

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Sorry @11manish, you are not suggesting a solution but rather you are explaining it. which I am aware of

The expected behavior works outside the FORM Control.

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IA-24091907-0 19 on at

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Hi @BCBuizer did you try that in form control? and yes I am using the modern combobox 1.0.0

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BCBuizer 22,833 Super User 2026 Season 1 on at

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Hi @IA-24091907-0,

Indeed, in the context of a form (I tried both modern and classic edit form), the selection resets. A control with identical code outside the context of a form does not show the same behaviour and does same the selected.

Given that this is unexpected behaviour, you could open a support ticket with MS and keep your fingers crossed for a quick resolution.

If you don't have the time to wait, you can try using a workaround with a variable. For this you need to update the OnChange and DefaultSelectedItems properties of the combobox:

OnChange = UpdateContext({locSelected: Self.Selected}) DefaultSelectedItems = Coalesce(locSelected, Parent.Default)

Also you'll have to reset the variable to prevent selections staying in place when changing records. How to do that depends on your app, but generally you'll need to set the variable back to blank whenever a new record to edit is selected.

If this reply helped you in any way, please give it a Like 💜 and in case it resolved your issue, please mark it as the Verified Answer ✅.

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IA-24091907-0 19 on at

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Thanks @BCBuizer. Your workaround did the trick! 🙌

This is so frustrating to find bug on much needed control

Important: This context variable needs to be set to blank after form submit.

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IA-24091907-0 19 on at

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Important: This context variable needs to be set to blank after form submit.

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