The short answer is that you need to check those two check boxes "Use delay entered for all frames" (and then enter a value to your liking) and " Use Disposal Entered for all Frames" making sure that "One frame per layer (replace)" option is specified in the listbox above it (as it is in your illustration)
On a more involved. basis, if you are going to edit gifs, you need to be familiar with the layers dialog. Look in the following screen shot at the area with the red arrow. Note the the frame delay and frame handling instructions are specified for each frame.
In the image you boosted from giphy, the frame handling instruction is (combine) which is what is causing your problem. Changing the setting as mentioned above and then saving as a new image will change (combine) to (replace) for every frame
On a more involved. basis, if you are going to edit gifs, you need to be familiar with the layers dialog. Look in the following screen shot at the area with the red arrow. Note the the frame delay and frame handling instructions are specified for each frame.
In the image you boosted from giphy, the frame handling instruction is (combine) which is what is causing your problem. Changing the setting as mentioned above and then saving as a new image will change (combine) to (replace) for every frame