Key gets stuck in ignition sometimes but it will come out if I let it sit fifteen minutes or so, or if I just unhook the battery.

[SamanthaSkokSubaru]

2012 Subaru Impreza Premium. About a year ago my key started off getting stuck in ignition once a month but would come out after a couple tries. Starting about a month ago it got worse to the point that it happens everyday, about 60% of the time. I have two ways I get the key out. I can unhook the battery and it will come out or I can let it sit 10-30 minutes and it will come out. What’s going on?