I just ran a job on teal PG acrylic, no different than probably 85% of my jobs. Crumb tray was clean, masking was on the PG and I used the default PG cut settings for teal, and these were all cut from the same general area of the sheet. Of the 6 pieces cut, 1 had a crazy amount of flashback. The rest were (relatively) fine. Not only did it visibly mar the acrylic, but you can feel it too. All of these were laid out perpendicular to the supports within the crumb tray. I’ve been seeing more worse-than-average flashback lately, but nothing this bad.
Thoughts on what may be causing the inconsistency? Seems weird to me.