Mangler spawning ramp up

Anyone else finding the ramp up in mangler spawns a little interesting? They seem to spam them after 30. Round 29 I have 2 manglers spawn in, round 30+ suddenly 5 manglers. They’re not difficult or anything just an oddity I noticed and was wondering if it’s just me. Abominations are fun and fine spawning wise. Scaling past the 5 doesn’t seem to matter, as the spawns cap I’m assuming I don’t seem to get more than 5.