Same here. I'll have a really good session on the range with very few mishits/shanks..Then I get on the course and cant hit. I seem to struggle more on 1st hole or two (as a general rule). Perhaps it is just nerves/tension that needs to be shaken off or maybe inadequate warmup. I try not to over do the warmups though as then I am just fatigued before even stepping foot on the course..
Interesting. I usually start out well with bogeys and maybe a par and then around the 5th or 6th hole hit a shank and it'll take a few holes to recover mentally.