My grandmother keeps destroying her diapers, what should we do?

Hello, my grandmother is a dementia patient, she's bedridden, can't walk or get out of bed for more than a year now. She's been wearing diapers for a long time now and we never had a problem like this before. Recently she started pushing off her pants and destroying her diapers, pulling it apart, putting it on backwards doesn't help. She mostly does this at night, but also in the day time. We don't really know why, maybe because she's stressed at needs to do something with her hands, or something along these lines. It's a nightmare to clean up the bits and pieces, also the pee keeps leaking. My mother cares for her next to work and cleaning it takes up a big part of her time, does anyone has any ideas what we should do? Sorry for grammar mistakes, English is not my first language