My old boy could be a nightmare. 95 times out of 100 he was fine but when he decided he was going to play, I had no chance. He thought catch was a really fun game. He'd circle around me and the second I took a step towards him he was off at full speed to the other end of his 18 acre field where he'd graze until I got there then off he'd go to the other end again. The second I tried to chase him, I was screwed. Walking him down wasn't an option as he'd leg it as far as possible to have as much time as he wanted to eat and do as he pleased before I got there again.
This was my go to with him. When he started circling me, I'd walk off without even looking. I'd get a chair, a bucket of feed and a book. I'd put the bucket of feed under the chair (it needs to be a tall bucket so she can't get her nose in when it's under the chair) sit on it, read my book and do nothing - not even look at him. Within minutes he'd be there trying to get at the food. After about 10 minutes of me ignoring him he'd practically be begging me to catch him. At this point I'd get up and walk away, taking the feed and the chair with me. I'd do the same for the next day or two and by day three, he'd be at the gate when he heard my car. Then he'd get caught, fed and turned out again. The next day I'd catch him and ride and normal service would resume for a couple of months.
You might need to go back a step or two as it's more ingrained in her. I'd cancel the farrier for now (I assume she's not shod and is just due a trim?) to take the pressure off. If she comes when you call, as she reaches you, leave her a small feed (take the other horses out if necessary) and walk away. Do this for a few days, then stay by the bucket while she eats but make no attempt to touch her. Once she's happy with that, give her a scratch while you're standing there, then drape a rope over her neck. Once she's happy with a rope going over her while eating, I'd try the above with the chair. When she's absolutely desperate for the food, drop a leather headcollar over the bucket so she has to put her nose in it to get the food. Once she's doing that happily, slide the headcollar over her neck, take it off again. The next step is to do it up. Once it's on, leave it on but let her go. Keep building it up This will at least make getting hold of her easier if you really need it in future but if you stick with the incremental steps, she might not need it. This whole process might take 3 weeks / a month depending on her progress.