Unbundling procedure at Trade Republic

I am completely at a loss. In July, the stock was booked with and the tax for the chess dividend was deducted from my clearing account. I was in the negative and made up the amount by transferring it. Today the Haleon share is suddenly 50% in the minus and the tax is again on my clearing account, but the cost price is higher and I am more in the minus. Does anyone know what is going on here?