Has anyone experienced html5 input issues in iOS Low Power Mode?

Questions
1

I have a strange issue on iPhone with Low Power Mode enabled.

When the player swipes quickly and repeatedly, after a few gestures on_input completely stops being called. During this time no input is received at all. If the player stops touching the screen for 1-2 seconds, input resumes normally.

This only happens on iPhone with Low Power Mode. Works fine on Android and PC.

On each swipe (press + drag + release) I do the following in on_input and update:

  • Pick a game object on press
  • Move it during drag by updating its position each frame
  • On release: rebuild mesh geometry for 2-4 game objects using resource.set_buffer (~3-6ms per call), then rebuild a batched shadow mesh with another resource.set_buffer.

Has anyone encountered this? It seems iOS interrupts or drops touch input right after a complex operation finishes while in Low Power Mode. Is it just me, or is this a known system limitation.

Does anyone have a workaround or a way to prevent the freeze?

1 Like
2

Yes, this is an iPhone issue. I’ve tested it on other games, including those using other engines, but the problem persists. Certain gestures completely disable page input on the iPhone. I wonder if this problem affects all iPhones or just my iPhone 11?

3

I am not familiar with the issue or what’s causing it. We would have to do an investigation. Can you please create an issue on GitHub?

4

Just a guess, but could it be related to this? :thinking:

Too much Lag in low power mode ios 26 - Apple Community

iPhone slow and laggy after iOS 26 update? How to fix it | GeeksChalk

1 Like
5

Unfortunately, I can’t reproduce the issue in an empty project or record a video showing my swipes in-game. Given that this issue occurs in games running on Unity and other engines (I tested it on different games from Poki), I don’t think Defold is the problem

6

Maybe I don’t use my iPhone often enough to say for sure whether this happened after the update or it’s always been like this

7

Ah, ok, then there’s likely nothing we can do.