[iOS] [ActivityIndicator] `IsRunning` ignores `IsVisible` when set to `true`

[Domik234]

Description

The ActivityIndicator behaves differently on iOS compared to Android.

On Android, both IsRunning and IsVisible must be true for the indicator to be shown and animated. Otherwise, it remains hidden.

On iOS, the behavior is inconsistent:

Initial State	Change Applied	Expected Result	Actual Result	✅ / ❌
IsRunning = false, IsVisible = false	Set IsRunning = true	Not visible	Visible	❌
IsRunning = false, IsVisible = false	Set IsVisible = true	Not visible	Not visible	✅
IsRunning = true, IsVisible = true	Set IsRunning = false	Not visible	Not visible	✅
IsRunning = true, IsVisible = true	Set IsVisible = false	Not visible	Not visible	✅

There should be a unified behavior where a change in either IsRunning or IsVisible triggers a check of both properties. The indicator should only be shown if both IsRunning and IsVisible are true.

I discovered this issue because the indicator remains rendered in my app even when IsVisible is set to false. In my case, a 1dp-sized ActivityIndicator blinks in the top-left corner of the layout after transitioning from IsRunning = true, IsVisible = true to IsVisible = false. I believe this could be addressed by properly synchronizing the visibility logic.

This behavior started after updating MAUI from 9.0.40 to 9.0.60 (I had to skip 9.0.50 due to a bug in CommunityToolkit dialogs that broke my app’s login flow).

iOS recording

Setting only IsRunning = true on iOS causes the ActivityIndicator to become visible, ignoring the value of IsVisible. This contradicts expected behavior and differs from Android, where both IsRunning and IsVisible must be true for the indicator to appear.

Steps to Reproduce

1. Create a new MAUI 9 app
2. Add to MainPage a new ActivityIndicator (IsRunning false, IsVisible false)
3. Set the IsRunning for ActivityIndicator to true (this should not work)

Link to public reproduction project repository

https://github.com/Domik234/Issue-MauiActivityIndicatorBehavior-iOS

Version with bug

9.0.60 SR6

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

9.0.40 SR4

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

Setting both properties should be enough. (IsRunning and IsVisible values should be always the same for proper behavior)

Relevant log output

[devanathan-vaithiyanathan]

This issue has been verified using Visual Studio code 1.99.2(9.0.60, 9.0.40, 9.0.0 and 8.0.100). Can repro this issue on iOS platform

[Domik234]

The issue might be resolved by setting HidesWhenStopped = false, as suggested in the Apple documentation for UIActivityIndicatorView.HidesWhenStopped.

You could apply this change in the MAUI source at the following location:
MauiActivityIndicator.cs (line 15).