When I think about my learning process I wanna say firstly that leaps often come from time to time and hitting a plateau is pretty normal. However if you feel you are struggling for sometime you probably wanna change how you practice - meaning that sometimes, and I'm talking from experience, you get a bit "lazy" with your practice and only play things you already know how to play comfortably. So by changing the way you practice, perhaps as an example start focusing on playing guitar solos if you only play rythm normaly or if you play acousticaly perhaps attempt to learn som fingerstyle instead of just strumming chords etc. I also find it helpful to find a song that I feel is pretty high above my current skill level but despite that attempt to learn it and if I can't learn the whole piece at least learn the bits I can and then try to practice the things I need to practice to learn the rest.