Hi everyone, sorry about the false positives, it appears that it was due to 2 occurrences of the Regex match happening, but due to Sourcemod's limitations its impossible to fetch both, thus incorrect occurrence was being fetched which happened to mismatch.
0.7 will fix the issue, if you have not yet upgraded its important to do so.
Updated to 0.7 - - Fix false positive by using a better Regex string because Sourcemod Regex does not support global modifier.
changes.