They often have threads where players note the many old bugs that have resurfaced. IE 'regressed'.
These then get entirely omitted from the tiny list of 'Known Issues' added to the next patch notes
Almost exactly that...it happens during PTU where Ci¬G will ask for volunteers to test for regressive bugs in every update build until the patch goes live. It used to be an ETF phase...but they farmed it out. It's a bit more focused than general PTU faffing about and with folk that generally, actually want to help find bugs...sort of a mini ETF if you will.
I kinda liked it as opposed to the usual PTU nonsense where nobody is really testing anything, far less reporting bugs...The PTU phases have just turned into a kids playground with new toys for the majority who now have wave 1 PTU access ...and judging by the ICC pages over the last couple of years, most of them typing on there have the comprehension, reading and writing skills of 5 year olds.
The general decline in testing focus isn't unique to SC either...ED beta testing, back when it required a small payment to take part outside of LTP owners, was far more focused than when FDev opened it up to all and sundry for free. The testing pages started to fill up with a running commentary by argumentative teenagers all pushing their own petty opinions and little agendas whilst testing nothing much outside of others folks patience.
I gave up on Elite beta testing just after 2.4 when the "I want everyone to pay attention to me!" posts vastly outweighed anything of real value to anyone...far less FDev trying to sift through it all... mostly the same reasons I binned ETF...
I still fly my ED beta 2.4 award badge on my ships though