Old seeds - AK-47 auto 17 weeks

Please help - Second time around growing this strain and have never seen Amber trichomes. This AK auto took a long time to mature. That’s the reason for the 17 weeks. Which I realize is a very long time for an auto. I’m still not seeing any Amber trichomes. Never have seen them - only my second time around. I have a gorilla glue that was supposed to be an auto and is at 17 weeks as well and figured out it must be a photo. Switched to 12 and 12 a few weeks ago and now it’s forming buds. Does this happen often? Thanks in advance!
 

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