When using the structure block to save a structure containing a few repeating and chain command blocks, everything saved perfectly fine. However, when I tried to use the set of command blocks to run the sequence I wanted, the repeating command blocks that had a tick delay of about 3 seconds started executing the command twice within the delayed period. I was able to reproduce the issue multiple times in the same world and a different one as well. I have attached a link to a  video showing the process from start to finish of creating a new world and reproducing the bug again.

Minecraft 2023-09-21 16-05-03.mp4