Can anyone tell when a winning session will arrive?
Symbols land at random across the 7x7 grid, so the Free Spins Feature may arrive on the next spin or after a long wait. How often it comes is not known in advance. The result of one session is random, whatever the RTP. An RTP figure describes the average return over a very large number of rounds, not what one visit will return.
The reels on the 7x7 grid show no RTP version, so the version in use is shown only in the game rules. Seven versions are listed for Dragon Hopper, and each one sets a different long-run return. Read the rules before you assume a figure applies to your session.
Clusters that cascade across the 7x7 grid can stack into a large round, yet the maximum win of Dragon Hopper, 10,000x Base Bet, is a ceiling reached very rarely. Nobody can predict whether a session will come near it, so treat the figure as a limit on the game and not as a target.