It depends on many factors. Sometimes the problem is LinkedIn at all. On most occasions, the problem is because of unstable network connections or third-party software that affects the performance of your browser. But, other factors like problematic servers, corrupted browsing data, browser extensions should also be considered when addressing this problem. If you know somebody else who also has a LinkedIn account, you can ask her or him to check the website. If she or he was also experiencing the same problem, then you can conclude that the problem is with the LinkedIn website with more certainty.