Charles Proxy - Response hangs when using Rewrite rule - charles-proxy

Question

I am using the Rewrite tool in Charles to modify part of the Response body however the network request never completes.
The Request's "Status" value hangs and stays as "Receiving response body". It never changes to "Complete"
Here is the Rewrite rule logic I am using:
I am trying to replace the contents between 2 objects in the Response body. The starting object is called "termsAndConditions" and the end object is called "CampaignTermsAndConditions"
When I look at the Error logs in Charles, this is what I get
2021/03/08 13:16:09 INFO com.xk72.charles.tools.rewrite.RewriteFilter POST https://www.my.fake.hostname/graphql?getApplicationWithCampaign Running: Body: termsAndConditions":[\s\S]*"CampaignTermsAndConditions -> termsAndConditions": [{ <rewrite_replacement_text> CampaignTermsAndConditions
2021/03/08 13:16:09 Exception in thread "pool-726-thread-1" java.lang.IndexOutOfBoundsException: No group 5
2021/03/08 13:16:09 at java.base/java.util.regex.Matcher.start(Unknown Source)
2021/03/08 13:16:09 at java.base/java.util.regex.Matcher.appendExpandedReplacement(Unknown Source)
2021/03/08 13:16:09 at java.base/java.util.regex.Matcher.appendReplacement(Unknown Source)
2021/03/08 13:16:09 at java.base/java.util.regex.Matcher.replaceAll(Unknown Source)
I'm fairly familiar with Charles and I've used lots of Rewrite rules. I've never come across this issue before