The normal approximations to the binomial are better as the expected count increases, and this translates to better values for proportion bias and proportion RMSE. Further, continuity corrections are more likely to be necessary when the expected count is less than 1; as discussed in the 5th bullet, continuity corrections introduce an upward bias for both methods.

From: Results

Cover of Simulation-Based Comparison of Methods for Meta-Analysis of Proportions and Rates
Simulation-Based Comparison of Methods for Meta-Analysis of Proportions and Rates [Internet].
Trikalinos TA, Trow P, Schmid CH.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.