Electric mesh can't be tensioned well enough, so even when it's not energised they will strangle themselves in it, and when it is energised there's the added joy of electric shocks.
In our earliest days, when we were young and naive (and TAS wasn't even a twinkle in Dan's eye), we tried keeping ewes and a tup in an electric fenced section. One ewe caught her horns in the mesh and started to struggle, turning herself round and round and over and over. Getting that lot of monofilament plastic and wire mesh off in the dark before she died was a mad panic, but we did it and promptly gave up on using electric fencing.
Another time a Shetland tup lamb, so tiny horns, got caught in a similar electric mesh fence, and to add to his fun, his chums were butting him from behind as he received his electric shocks. I recued him, but he needed several weeks of TLC and nursing before he was fit to go back with the crowd.
Now the only use we have for the several rolls of electric mesh we have, is to use it non-energised to make a funnel for rounding up the flock into a catching pen. Even then we have to roll it up and take it away immediately as tups in particular will bash around at it and get a whole roll stuck round their horns
So, find an alternative to your strip grazing unless you can watch the flock 24 hours a day.