I saw quite a lot of Angel prior to Covid. I think afterwards she moved to Norwich for a while.
I thought she was an excellent SP, always delivered a great service and I found her FAF. However, since she came back to Sheffield, I found her impossible to book and she actually ghosted me once and her attitude on the phone when I questioned why was "couldn't give a fuck" so won't see her again. I'm sure she's really upset about that 
I saw her about 6 times last year. Mostly no problems, but one time we had some severely crossed wires where I didn't confirm so when I got there she assumed I'd cancelled and after a bit of appeasement I got to sit in the car for 20 mins while she got ready. Kind of reassuring as she's always fresh out the shower and always makes an effort dressing up.
Her English isn't as good as you might think, and she seems to be really hot on people confirming 30-60 mins before even if you only book 2h before.
As to OPs question, no clue when she will be back. I constantly got told she was going home in a week or 2 and she usually rescheduled. Pretty sure she was only going for a couple of weeks but guess she got distracted by RL.