I would imagine the reason is because of the reorganization of their shares:
"Brookfield Renewable Corporation (BEPC) has recently completed a reorganization to maintain its advantageous corporate structure in light of anticipated amendments to the Income Tax Act in Canada.
BUSINESS INSIDER MARKETS
As part of this reorganization, BEPC shareholders exchanged their existing class A exchangeable subordinate voting shares for new class A exchangeable shares. These new shares provide the same economic benefits and governance rights as the previous ones, ensuring continuity for investors. The new class A exchangeable shares continue to trade on the Toronto Stock Exchange and the New York Stock Exchange under the symbol "BEPC."
BROOKFIELD
This strategic move was driven by Brookfield Renewable's desire to address proposed tax changes that could have led to additional costs for BEPC. By implementing this reorganization, the company aims to preserve the benefits of its existing business structure while adapting to the evolving tax landscape.
BROOKFIELD
The reorganization received all necessary shareholder, court, and regulatory approvals and became effective prior to the market opening on December 24, 2024. "
WHat I would imagine happened is maybe your reinvestment was automatically directed towards the old class of shares. Further distributions will likely be sent to the new class.