Frogs scared to go into water?

I see this on occasion while doing amphibian surveys, particularly in smaller bodies of water such as ephemeral pools. I have noticed that it most often happens when there is little to no cover for the frogs to hide in once they get into the water such as fallen leaves, aquatic plants or woody debris. I have also seen this when the waterbody has fish in it. They often hop away from the water or hop into the water and quickly exit back on to the bank. Most of the areas I survey do not have many bullfrogs, so I see this most often with green frogs as well. I would suggest adding something into the pond that they can hide in and see if that has any effect on their behavior…