Got a response from Github issues channel which resolved the problem, its because of the highcharts doc not being up to date with the latest version of spiral implementation. Posting the thread here for others benefit.
https://github.com/highcharts/highcharts/issues/10644

Regards,
Sunil

Hi Rafal, Thanks for your support, unfortunately changing the version to even 6.1.2 breaks some of the other charts and we were looking to avoid a complete re testing cycle by sticking with 6.1.1. but now looks like its inevitable. I shall try posting on the channel to see if i can get some help. Ch...

Hi Sunil, Thank you for contacting us with your issue. Before I start debugging and digging into it, could you, please, simplify your jsFiddle as much as you can to have minimum of the code reproducing the issue? Best regards! Hi Rafal, Thanks for responding, here is a simplified version, please ch...

Hi Team, I have developed a wordcloud which uses the custom archimedean spiral, during development i used generic reference to refer to hicharts and wordcloud module so didnt find and issues. However later realized that we are using 6.1.1 for most of the other charts and upgrading to 7.x is breaking...

m_sunils, There is a link to documentation which helps you to understand word-cloud and how building algorithm works API: https://www.highcharts.com/docs/chart-and-series-types/word-cloud-series#custom-spiralling-algorithm . I've reached something similar by manipulating t and x values. Check demo:...

Hello m_sunis, In a word cloud, spiral property by default is set to rectangular API: https://api.highcharts.com/highcharts/plotOptions.wordcloud.spiral . In most of our demos word cloud is displayed as an exactly rectangular spiral, demo: https://jsfiddle.net/Bastss/t7og1q3w/ . Check for a change,...

I need to implement a rectangular spiral in word cloud, the archimedean spiral works fine as mentioned on highcharts docs. But I am unable to figure out how a rectangular spiral can be applied (something like an elongated ellipse), tried something along the lines of whats in this sample https://gith...