Dear @keshavgupta,
Thank you for the topic.
We have checked and noticed that there is a plugin, that adds a Defer Attribute to your WordPress Core Main JavaScript, that is why this kind of issue occurs for you.
See the screenshot: https://ibb.co/chxN2Ch
Also, we have checked and noticed that you are currently using the LiteSpeed Cache plugin.
Most presumably, the conflict appears due to the Cache plugin.
See the screenshot: https://ibb.co/MR60Vcf
So, firstly, you can make a DB backup for your safety (you can use Updraft Plus ).
Then, please clear all the caches and let us know whether the issue persists or not.
Also, please, make sure that it does not store a strong cache and that the webpage where the poll is located does not become static(HTML).
Check whether deactivate PHP cache is ticked from the settings of the cache plugin or not.
If yes, then please deactivate it.
Please clear all the caches, check this case again and let us know about the outcome.
Thank you.