When you buy a premium request then reinstall the app without sending one out you can't buy this exact amount again and don't have the icons you bought. You get the error from Google Play that you've already purchased this product.
For a single case you can fix this by refunding the unused request but that can't be a solution.
Hope this can get fixed or at least note somewhere that you should'nt reinstall with open premium requests.
I'd recommend do it like:
Add a warning when buying that purchases are lost when uninstalling.
Then when you install remove all ownerships like when the icons got requested.
When you buy a premium request then reinstall the app without sending one out you can't buy this exact amount again and don't have the icons you bought. You get the error from Google Play that you've already purchased this product. For a single case you can fix this by refunding the unused request but that can't be a solution. Hope this can get fixed or at least note somewhere that you should'nt reinstall with open premium requests.
I'd recommend do it like: Add a warning when buying that purchases are lost when uninstalling. Then when you install remove all ownerships like when the icons got requested.