12 week old fuss/sleep changes

12 week old sleeping changed!

Babe has been pretty good at settling drowsy but awake for a lot of his naps, but since 11w6days, he has cried and cried when put into the cot.

Have had to resort back to shooshing, covering eyes, some leg jiggles and just a lot more settling in general.

Could this be a negative association with the cot? Or just weird 12 week old growth spurt/development phase that will pass?

When hurdles like this come up (little sleep regressions when previously doing really well) do you keep doing what you were doing before and hope for the best? I don’t want to reintroduce associations like rocking to sleep or a general dependence on us to sleep.

Sleeps really well at night time (self settling and 8-10hrs for the last 10 days).