Not in my case (yet).
I have deliberately chosen for a somewhat smaller input size (also, I was not always willing to destroy the age of split blocks
when they were generated almost a day before I checked) so most my blocks are in the 1000-2000 range and do not yet reach
the cap (1000 HYP) although it does take them longer before they stake than in the beginning, when almost everything staked
around 9 days age. The only cap that I am experiencing is one smaller block of 600 that is nearing the 30 days cap, after which it
might stop gaining reward if it does not stake in the coming 2 days, we'll see. So, I am still getting very close to 750% only the
blocks take a little longer to stake, this last one was pretty big and still took more than 12 days.
Thanks for the bug report Cor2, you have led me to find another error
Am testing out some new code for it now.