composables/useOpenLayersEvents.ts can not get getCurrentInstance without setup function

[DLinser]

Describe the bug
It it normal first time. But something wrong happend in the event function like the 'watch'.It is return null

[d-koppenhagen]

Please provide a minimal reporduction repo / stackblitz project to be able to investigate.

[DLinser]

just like this demo
<ol-source-vector :projection="projection"> <ol-interaction-draw v-if="drawEnable" :type="drawType" @drawend="drawend" @drawstart="drawstart" > <ol-style> <ol-style-stroke color="blue" :width="2" /> <ol-style-fill color="rgba(255, 255, 0, 0.4)" /> </ol-style> </ol-interaction-draw> </ol-source-vector>

the getCurrentInstance in 'composables/useOpenLayersEvents.ts' does not effect when you want to change drawType