Can you upload it to a file hoster (or Google docs) and post the link here? Thanks!

Sure thing.

Just another update; I discovered while playing around that this problem only happened on tracks that also had DMG Audio EQuality loaded as well. If I removed that plugin, everything returned to normal. I'll alert DMG to this problem in case it's on their end. I've also found out that the noise bursts in Decapitator are a known issue not specific to Reaper.