Same issue here.
I recently discovered by chance that a large car rental security deposit wasn't refunded within a reasonable timeframe. After looking into the issue a couple of days ago, I learned from internet discussions among Bunq users that you often have to manually request these refunds. Once I made the request, the money was returned immediately.
This led me to investigate my other transactions, where I found several unreturned reserve payments from the past few months. Last evening alone, I managed to claim refunds for four different deposits (hotels, car rentals, and car sharing), totaling around 900 Euros that had been stuck unreleased all this time.
This practice is clearly unacceptable and makes me seriously reconsider using my Bunq card as my primary card for travels.
