编码的URL中的双倍大于符号（>>）会生成403 Forbidden错误

We have a server that has runs a restful GET API which receives data from two different sources. Today I noticed that data from the one source was generating a 403 error when the URL contained double greater than signs (>>). Firing up my browser and hitting the api with ?text=test%3E%3E generated the 403 but things got confusing when I tried submitting the same text via the second source - it worked fine, no 403.We have a server that has runs a restful GET AP