This is what the issue looks like. The opcodes following the sample path are not highlighted correctly.

This line seems to be the source of the trouble. The regex only accounts for line comments or line end after the path. The spec for sample paths makes it fairly tricky to parse correctly. The only condition is that the path can't contain the "=" character. If you change this regex to "(?=(\\s\/\/|\\s\/\\*|\\s\\w*\\=|$))", it will additionally handle the cases where the path is followed by another opcode or a block comment. This covers all the cases I've run into where the highlighting was broken.

The result of this change is the opcodes are highlighted correctly.