Having Problems with detection of tables
#### Code Sample, a copy-pastable example if possible

```python
first_concurrent = requests.get(url, proxies=proxies, headers=headers)
first_concurrent_text = first_concurrent.text
first_concurrent_all_table = pd.read_html(first_concurrent_text)
first_concurrent_first_table = first_concurrent_all_table[0]
```
#### Problem description

The website has a table on it.  Sometiems when I run the code it finds the table other times it does not. This is not an issue with syntax of code, rather I think its about the read_html function. I went over the module, stackoverflow, etc, and did not find a solution to my problem. 

PS - I have the newest version of pandas. 
