something wrong with my pothos!

i've had this pothos for over a year, and it's grown very long but used to be way more lush at the top and overall just a lot greener. i gave it a much needed repot around october and a few weeks later i noticed it was paling and yellowing close to the top but still very green to the bottom. i bought plant food sticks for it as i figured it was low on nutrients. but that was in october so i might need to put some new ones in. but it's just been slowly losing leaves since the repotting and it used to be way more thick at the top. i even trimmed the bottoms of all the vines a few weeks ago and propagated them then planted them into the top. since then all the bottoms have grown out nicely. but i can still see paling close to the vine for some leaves, and im worried i'll just lose more and more

i water it around once every one and a half weeks or closer to one week, depending on if it suddenly looks a bit wilted. there is a drainage hole at the bottom. my apartment is super well lit too, and gets sun all the time. the plant used to hang from my wall right beside a window, but has gotten way too long for that, and it was a wake up call when it got too heavy and fell from the hook, and the vase shattered lol

i'll put some nutrient sticks in since it's been three months since i put them, but i've just been worried about it since it seems to be slowly slowly dying ever since i repotted it in october, paling close to the vine and losing leaves

does anyone know what it might need???