Polls in Teams causing lots of errors

We were running a large management meeting on Thursday the 15th of June we set up a couple of polls and they worked well initially but then we started getting flooded with error messages. 

Examples of the errors below, if there any advise on why this happened and how to avoid in the future 

[Yesterday 13:53] Polls

An error has occurred. Please try again. Cid:d92a6956-4357-49ac-adca-1700aced7d66

[Yesterday 13:53] Polls

Claire Stritton

An error has occurred. Please try again. Cid:e4f8c389-4512-46dd-98d6-9a708e00b8d3

[Yesterday 13:53] Polls

An error has occurred. Please try again. Cid:7de5e3ff-822b-40db-acb0-bb1a389e918c

[Yesterday 13:53] Polls

An error has occurred. Please try again. Cid:60eefa3b-96d1-4968-bb7a-c72841b7e5cc

[Yesterday 13:53] Polls

An error has occurred. Please try again. Cid:2d2e208a-0263-49bf-92fe-3b460cef2eb4

[Yesterday 13:53] Polls

An error has occurred. Please try again. Cid:2d59ecff-fb57-4e7e-a0cf-bee185d4aec2