On web the first frame of a multitouch interact_pointer_pos exists, but multitouch doesn't

[Devon7925]

Describe the bug
Multitouch events are not reported as multitouch for the first frame on web. In my app single finger dragging draws, but using multitouch pans. When I'm mid draw and put a second finger down this leads to a line being drawn between the two fingers before it starts panning. This does not happen on windows but happens on both my phone and computer's web browsers.

To Reproduce
Steps to reproduce the behavior:

1. Print interact_pointer_pos iff ctx.multi_touch() is None
2. Touch with two fingers and notice the second finger's location is reported despite it being a multitouch

Expected behavior
ctx.multi_touch() should be available the first frame of a multitouch

Desktop (please complete the following information):

• OS: Windows 11 / Android
• Browser: Edge / Chrome

Code sample
This is a trimmed down version of the code I'm using.

let mut did_drag = false;
if let Some(multi_touch) = response.ctx.multi_touch() {
    did_drag = true;
}
if let Some(pointer_pos) = response.interact_pointer_pos() {
    if (response.drag_started_by(egui::PointerButton::Primary)
        || response.dragged_by(egui::PointerButton::Primary))
        && !did_drag
    {
        // do drawing
    }
}