Wrong marker in mouse events

Nobody has claimed this yet.

Latest maptalks-gl from CDN (maptalks-gl v0.105.4). Sometimes mouse events have a wrong target marker. That happened multiple times with different markers. Mobile simulator is also affected.

I'd love to have a smaller reproducible example but I only got this, if you go the link below and zoom back and forth you eventually notice that hover and click events don't match the marker.

* https://joric.github.io/stalker#050DB9A84EA309D1988B7AA64A673BC9

I can only guess what happens, but it's probably an R-tree (or another spatial structure) bug. The other marker is usually not far away. Maybe it happens because I use rectangular CRS and it's fairly large, 8129000 pixels so float precision may be not enough.

```js
map = new maptalks.Map('map', {
spatialReference : {
projection : 'identity',
fullExtent : { top: top, left: left, bottom: bottom, right: right }, // mandatory to hide 404
resolutions: Array.from({length: maxZoom + 1},(_,i) => w / tileSize / (1<

Start with the linked reproducible example and the mouse-event handling for markers, then reproduce the mismatch while changing zoom level, window size, marker order, and marker coordinates. Done means hover and click events consistently target the marker under the pointer in the reported scenarios.

Written by the indexing model from the issue text.